rockchip: add support for Radxa ROCK Pi E

This adds support for Radxa ROCK Pi E, rockchip rk3328 board.

Specification:

- CPU: Rockchip RK3328 64-bit Quad-core
- RAM: DDR3 256MB ~ 2GB
- Network:
    1 x 10/100/1000M Ethernet
    1 x 10/100M Ethernet
- Storage:
    1 x MicroSD Slot
    1 x eMMC Module Slot
- USB Host/OTG:
    1 x USB3.0 Type A HOST
    1 x USB2.0 HOST (40-pin pin-header)
- Wireless
    RTL8723DU/RTL8821CU
- Debug Serial:
    1500000 baud at UART2 ( 40-pin pin-header)
- Power Supply:
    Type-C 5V
    Optionally PoE

Installation:
- Write image to SD Card or EMMC with dd
- Boot ROCK Pi E from the SD Card

Signed-off-by: Jayantajit Gogoi <jayanta.gogoi525@gmail.com>

target/linux/rockchip/image/armv8.mk

@@ -79,6 +79,15 @@ define Device/radxa_rock-pi-4a
 endef
 TARGET_DEVICES += radxa_rock-pi-4a
 
+define Device/radxa_rock-pi-e
+  DEVICE_VENDOR := Radxa
+  DEVICE_MODEL := ROCK Pi E
+  SOC := rk3328
+  UBOOT_DEVICE_NAME := rock-pi-e-rk3328
+  IMAGE/sysupgrade.img.gz := boot-common | boot-script | pine64-img | gzip | append-metadata
+endef
+TARGET_DEVICES += radxa_rock-pi-e
+
 define Device/xunlong_orangepi-r1-plus
   DEVICE_VENDOR := Xunlong
   DEVICE_MODEL := Orange Pi R1 Plus