sunxi: add Orange Pi 2 support

- H3 @ 1.3 GHz
- 1GiB DDR3
- 10/100Mbps Ethernet
- Realtek RTL8189ETV wifi
- 4 USB 2.0

Difference to the "Orange Pi Plus" is the lack of Gbit ethernet
and lack of onboard flash.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

package/boot/uboot-sunxi/Makefile

@@ -150,6 +150,12 @@ define U-Boot/orangepi_plus
   BUILD_DEVICES:=sun8i-h3-orangepi-plus
 endef
 
+define U-Boot/orangepi_2
+  BUILD_SUBTARGET:=cortexa7
+  NAME:=Orange Pi 2 (H3)
+  BUILD_DEVICES:=sun8i-h3-orangepi-2
+endef
+
 define U-Boot/pangolin
   BUILD_SUBTARGET:=cortexa7
   NAME:=Theobroma A31-yQ7 devboard
@@ -185,6 +191,7 @@ UBOOT_TARGETS := \
 	nanopi_neo \
 	orangepi_r1 \
 	orangepi_plus \
+	orangepi_2 \
 	pangolin \
 	pine64_plus