u-boot-rockchip: add
u-boot-rockchip: add

This recipe was taken from the Rockchip team's recipe at
https://github.com/rockchip-linux/meta-rockchip/commit/6a139d5b7510c7ba36aace82c239b894d5741cac

It was mostly written by Jacob Chen <8e4ad2556945082201a91c99684cac5c158a9317@iotwrt.com> and I've made a
couple small modifications.

Reviewd-by: Eddie Cai <7881276579abdfee5de1ac41997b4876ff2d1c35@gmail.com>
Signed-off-by: Jacob Chen <8e4ad2556945082201a91c99684cac5c158a9317@iotwrt.com>
Signed-off-by: Trevor Woerner <8835777cd84fba3d7873eabbbe1f2de2d3f25b00@gmail.com>

hizukiayaka/meta-rockchip,hizukiayaka/meta-rockchip,hizukiayaka/meta-rockchip,twoerner/meta-rockchip-twoerner,twoerner/meta-rockchip-twoerner