arm64: dts: rockchip: Move device specific properties

Move device specific properties related to the ADC Joystick to
different board specific device trees. This is in preparation for
adding the Anbernic RG-Arc series of devices.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20240123212111.202146-2-macroalpha82@gmail.com


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