According to RK3588 TRM, VO0_GRF and VO1_GRF have a similar layout, but
definitely not an identical one, therefore sharing the compatible is not
really justified.

Since currently there is no user of this, hence no ABI break, let's fix
it by providing dedicated compatibles while deprecating the old one.
Reported-by: Conor Dooley <conor@kernel.org>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240828-rk3588-vo-grf-compat-v2-1-4db2f791593f@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>