kernel: ltq-tapi: add patch fixing compilation warning

kernel: ltq-tapi: add patch fixing compilation warning

Add patch fixing compilation warning for switch fallthrough and
copy_to_user ret not handled.
Fix compilation warning:
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_dial.c: In function 'ifx_tapi_dial_OnTimer':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_dial.c:318:38: error: this statement may fall through [-Werror=implicit-fallthrough=]
  318 |          pTapiDialData->nHookChanges = 0;
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_dial.c:322:7: note: here
  322 |       case TAPI_HOOK_STATE_DIAL_L_VAL:
      |       ^~~~
cc1: all warnings being treated as errors

/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_event.c: In function 'IFX_TAPI_Event_Dispatch_ProcessCtx':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_event.c:1546:30: error: this statement may fall through [-Werror=implicit-fallthrough=]
 1546 |                   pEvent->ch = IFX_TAPI_DEVICE_CH_NUMBER;
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_event.c:1548:16: note: here
 1548 |                case  IFX_TAPI_ERRSRC_LL_CH:
      |                ^~~~
cc1: all warnings being treated as errors

/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_ioctl.c: In function 'TAPI_IoctlDev':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_ioctl.c:705:19: error: ignoring return value of 'copy_to_user' declared with attribute 'warn_unused_result' [-Werror=unused-result]
  705 |                   copy_to_user ((IFX_void_t*)ioarg, p_tmp, sizeof(IFX_TAPI_CAP_t));
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_ioctl.c: In function 'TAPI_IoctlCh':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_ioctl.c:1553:14: error: this statement may fall through [-Werror=implicit-fallthrough=]
 1553 |          ret = TAPI_statusNotSupported;
      |          ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_ioctl.c:1555:7: note: here
 1555 |       default:
      |       ^~~~~~~
cc1: all warnings being treated as errors

/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c: In function 'cid_fsm_alert_exec':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:2037:31: error: this statement may fall through [-Werror=implicit-fallthrough=]
 2037 |          pTxData->nCidSubState++;
      |          ~~~~~~~~~~~~~~~~~~~~~^~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:2039:7: note: here
 2039 |       case 1:
      |       ^~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:2053:31: error: this statement may fall through [-Werror=implicit-fallthrough=]
 2053 |          pTxData->nCidSubState++;
      |          ~~~~~~~~~~~~~~~~~~~~~^~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:2055:7: note: here
 2055 |       case 2:
      |       ^~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:2070:31: error: this statement may fall through [-Werror=implicit-fallthrough=]
 2070 |          pTxData->nCidSubState++;
      |          ~~~~~~~~~~~~~~~~~~~~~^~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:2072:7: note: here
 2072 |       default:
      |       ^~~~~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c: In function 'cid_prepare_data':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:1501:13: error: this statement may fall through [-Werror=implicit-fallthrough=]
 1501 |          if (IFX_TAPI_CID_HM_ONHOOK == pTxData->txHookMode)
      |             ^
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:1509:7: note: here
 1509 |       default:
      |       ^~~~~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:1531:16: error: this statement may fall through [-Werror=implicit-fallthrough=]
 1531 |             if (IFX_TAPI_CID_STD_KPN_DTMF_FSK != pConfData->nStandard)
      |                ^
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:1535:10: note: here
 1535 |          case IFX_TAPI_CID_GEN_TYPE_FSK:
      |          ^~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c: In function 'cid_lookup_transparent':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:1425:10: error: this statement may fall through [-Werror=implicit-fallthrough=]
 1425 |          cidfsk_set_tx_time (pTxData, &pConfData->TapiCidFskConf);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:1427:7: note: here
 1427 |       case IFX_TAPI_CID_GEN_TYPE_DTMF:
      |       ^~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c: In function 'TAPI_Phone_CID_Stop_Tx':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:3445:10: error: this statement may fall through [-Werror=implicit-fallthrough=]
 3445 |          switch (pTxData->nAlertType)
      |          ^~~~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:3461:7: note: here
 3461 |       case TAPI_CID_STATE_ACK:
      |       ^~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:3463:13: error: this statement may fall through [-Werror=implicit-fallthrough=]
 3463 |          if (ptr_chk(pDrvCtx->SIG.DTMFD_Override, ""))
      |             ^
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:3472:7: note: here
 3472 |       case TAPI_CID_STATE_SENDING:
      |       ^~~~
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c: In function 'TAPI_Phone_Get_CidRxData':
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:4060:10: error: this statement may fall through [-Werror=implicit-fallthrough=]
 4060 |       if (IFX_Fifo_isEmpty(&(pCidRx->TapiCidRxFifo)))
      |          ^
/home/ansuel/openwrt-ansuel/openwrt/build_dir/target-mips-openwrt-linux-musl_musl/linux-lantiq_xway/drv_tapi-3.13.0/src/drv_tapi_cid.c:4069:4: note: here
 4069 |    default:
      |    ^~~~~~~
cc1: all warnings being treated as errors

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>