drm/rockchip: inno_hdmi: Remove YUV-based csc coefficents

Now that the unneeded support for YUV based input formats is gone, the csc
coefficients for those formats can be dropped as well.

Signed-off-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231222174220.55249-12-knaerzche@gmail.com