[U-Boot] sunxi: add device tree for Orange Pi R1 board

[Jagan Teki]

On Sun, Oct 1, 2017 at 11:02 PM, Hauke Mehrtens <hauke at hauke-m.de> wrote:
> This board is very similar to the Orange Pi Zero boards, instead of the
> USB port it has an USB to Ethernet adapter connected to the USB port and
> by default it has a SPI flash, but this is still missing in the device
> tree.
>
> Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
> ---

- Squash the defconfig patch with this, for initial support
- Mention merge commit from Linux where this dts picked-up