arm64: dts: rockchip: Enable video output on rk3566-roc-pc

Add the device tree nodes to enable video output on the Station M2.
Enable the GPU and HDMI nodes and fix the GPU regulator range.

Signed-off-by: Furkan Kardame <f.kardame@manjaro.org>
Link: https://lore.kernel.org/r/20220627202208.45770-1-f.kardame@manjaro.org


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