rockchip: add Bananapi-R2 Pro board support

rockchip: add Bananapi-R2 Pro board support

Hardware spec:

- Rockchip RK3568 Quad-core ARM Cortex-A55 CPU 2GHz
- GPU Mali-G52 1-Core-2EE OpenGL ES3.2 Vu1kn 1.1 OpenCL 2.0
- Memory2G DDR3 SDRAM (option 4G)
- Storage Onboard 16GB eMMC Flash, Micro SD-Card slot, SATA 3.0 Port,SPI flash
- Network 5 x 10/100/1000 Mbit/s Ethernet MT7531
- Display 1 HDMI port, 2 DSI interface(1 DSI can change to LVDS by software)
- Camera 1 CSI camera interface
- Audio Output HDMI & I2S & Speaker & Headphone
- USB port USB 3.0 PORT (x2), micro USB OTG (x1)
- PCIE 1 mini pcie interface & 1 M.2 key-e interface
- Remote IR Receiver (x1)
- GPIO 40 Pin Header : GPIO (x28) and Power (+5V, +3.3V and GND).
- Switches Reset button, Power button, U-boot button
- LED Power Status
- Power Source 12 volt 2A via DC Power

Installation:

Uncompress the OpenWrt sysupgrade and write image to the SD card using dd (dd if=*.img of=/*)
Boot from the SD card
1-hold down the MaskRom button
2-Connect DC power
3-Wait 5 seconds, release the button.

eMMC Installation:

1-Uncompress the OpenWrt sysupgrade image
2-fash to eMMC
dd if=openwrt-rockchip-armv8-sinovoip_bpi-r2-pro-squashfs-sysupgrade.img of=/dev/mmcblk1
sync
3-remove SD card
reboot

Signed-off-by: Antonio Flores <antflores627@gmail.com>