arm64: dts: rockchip: Split RG351M from Odroid Go Advance

arm64: dts: rockchip: Split RG351M from Odroid Go Advance

Split the RG351M into its own DTSI file. The RG351M, unlike the Odroid
Go Advance, has no ADC joysticks, no GPIO buttons (except for volume
on the RG351V), a PWM vibrator that interferes with an Odroid
regulator, and different LEDs. Split the RG351M into a DTSI file
that can then be imported into the DTS files for the RG351M and a
new RG351V.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20231120230131.57705-3-macroalpha82@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>