arm64: dts: rockchip: Fix compatibles for RK3588 VO{0,1}_GRF

arm64: dts: rockchip: Fix compatibles for RK3588 VO{0,1}_GRF

RK3588 VO0 and VO1 GRFs are not identical (though quite similar in terms
of layout) and, therefore, incorrectly shared the compatible string.

Since the related binding document has been updated to use dedicated
strings, update the compatibles for vo{0,1}_grf DT nodes accordingly.

Additionally, for consistency, set the full region size (16KB) for
VO1_GRF.

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-v2-2-4db2f791593f@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>