sunxi: add proper device tree for Orange Pi Zero boards

Add a proper device tree file for Orange Pi Zero boards from Xunlong,
which come with a Allwinner H2+ SoC (similar to H3).

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Reviewed-by: Jagan Teki <jagan@openedev.com>
2 files changed