drm/rockchip: vop2: Set YUV/RGB overlay mode

[ Upstream commit dd49ee46 ]

Set overlay mode register according to the
output mode is yuv or rgb.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231211115805.1785073-1-andyshrk@163.com


Stable-dep-of: 0ca953ac ("drm/rockchip: vop2: Fix the windows switch between different layers")
Signed-off-by: Sasha Levin <sashal@kernel.org>