ramips/mt7621: fix IMAGE_SIZE for all devices

ramips/mt7621: fix IMAGE_SIZE for all devices

This fixes IMAGE_SIZE for all devices based on the partition size
given in DTS:

DEVICE                     *.MK     *.DTS     VERDICT
afoundry_ew1200            (16M)    0xfb0000
asiarf_ap7621-001          (16M)    0xfa0000  wrong
buffalo_wsr-1166dhp        (16M)    0xf90000  wrong
buffalo_wsr-600dhp         (16M)    0xfb0000
dlink_dir-860l-b1          (16M)    0xfb0000
d-team_newifi-d2           (32M)    0x1fb0000
d-team_pbr-m1              (16M)    0xfb0000
elecom_wrc-1167ghbk2-s     15488k   0xf20000
elecom_wrc-1900gst         11264k   0xb00000
elecom_wrc-2533gst         11264k   0xb00000
firefly_firewrt            (16M)    0xfb0000
gehua_ghl-r-001            (32M)    0x1fb0000
gnubee_gb-pc1              (32M)    0x1fb0000
gnubee_gb-pc2              (32M)    0x1fb0000
hiwifi_hc5962              (32M)    0x2000000 wrong (kernel + ubi)
iodata_wn-ax1167gr         15552k   0xf30000
iodata_wn-gx300gr          7798784  0x770000
lenovo_newifi-d1           (32M)    0x1fb0000
linksys_re6500             -        0x7b0000  default
mediatek_ap-mt7621a-v60    (8M)     0x7b0000
mediatek_mt7621-eval-board (4M)     0xec0000  wrong (rootfs)
mikrotik_rb750gr3          [16128k] 0xfc0000
mikrotik_rbm11g            [16128k] 0xFC0000
mikrotik_rbm33g            [16128k] 0xFC0000
mqmaker_witi-256m          (16M)    0xfb0000
mqmaker_witi-512m          (16M)    0xfb0000
mtc_wr1201                 16000k   0xfa0000
netgear_ex6150             14848k   0xe80000
netgear_r6220              28672k   0x1c00000
netgear_r6350              40960k   0x2800000
netgear_wndr3700-v5        15232k   0xee0000
netis_wf-2881              129280k  0x7E40000
phicomm_k2p                15744k   0xf60000
planex_vr500               66453504 0x3fb0000 wrong
samknows_whitebox-v8       (16M)    0xfb0000
storylink_sap-g3200u3      -        0x7b0000  default
telco-electronics_x1       16064k   0xfb0000
thunder_timecloud          -        0xfb0000  wrong
totolink_a7000r            16064k   0xfb0000
tplink_re350-v1            6016k    0x5e0000
ubiquiti_edgerouterx       -        0xfa00000 wrong (kernel1 + ubi)
ubiquiti_edgerouterx-sfp   -        0xfa00000 wrong (kernel1 + ubi)
unielec_u7621-06-256m-16m  16064k   0xfb0000
unielec_u7621-06-512m-64m  65216k   0x3fb0000
wevo_11acnas               (16M)    0xfb0000
wevo_w2914ns-v2            (16M)    0xfb0000
xiaomi_mir3g               32768k   0x7980000 wrong (kernel + ubi)
xiaomi_mir3p               (32M)    0xf980000 wrong (kernel + ubi)
xzwifi_creativebox-v1      (32M)    0x1fb0000
youhua_wr1200js            16064k   0xfb0000
youku_yk-l2                (16M)    0xfb0000
zbtlink_zbt-we1326         (16M)    0xfb0000
zbtlink_zbt-we3526         (16M)    0xfb0000
zbtlink_zbt-wg2626         (16M)    0xfb0000
zbtlink_zbt-wg3526-16m     (16M)    0xfb0000
zbtlink_zbt-wg3526-32m     (32M)    0x1fb0000

No verdict means that the device is correctly set.

Legend:
( ): Value is set via ralink_default_fw_size_xxM
[ ]: Value is derived from parent definition
 - : Value is not set and derived from default definition

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>