ARM: dts: sunxi: add support for Lichee Pi Zero board

Lichee Pi Zero is a small-sized V3s board, which is
breadboard-compatible, and with a MicroUSB port with both OTG function
and power function.

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>