arm64: dts: rockchip: Add HDMI supplies on rk3399-roc-pc

Add avdd-0v9-supply and avdd-1v8-supply to hdmi node for
rk3399-roc-pc to silence dmesg warning and match the name
of the 1v8 supply to the circuit sheet.

Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Link: https://lore.kernel.org/r/20220915111138.1108-1-m.reichl@fivetechno.de


Signed-off-by: Heiko Stuebner <heiko@sntech.de>