arm64: dts: allwinner: h6: orangepi: Add gpio power supply

OrangePi Lite2 and One Plus have GPIO ports powered by same power
supplies. Add them in common DT.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>