uboot-sunxi: add support for LinkSprite pcDuino v3 (a20)

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



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40605 3c298f89-4303-0410-b956-a3cf2f4a3e73
sunxi: add board support for LinkSprite pcDuino v3

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



git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40606 3c298f89-4303-0410-b956-a3cf2f4a3e73