drm/msm/dpu: drop dpu_csc_cfg from dpu_plane

Simplify code surrounding CSC table setup by removing struct dpu_csc_cfg
pointer from dpu_plane and getting it directly at the CSC setup time.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Link: https://lore.kernel.org/r/20210930140002.308628-8-dmitry.baryshkov@linaro.org


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>