drm/atomic: verify that gamma/degamma LUTs are not too big

drm/atomic: verify that gamma/degamma LUTs are not too big

The kernel specifies LUT table sizes in a separate property, however it
doesn't enforce it as a maximum. Some drivers implement max size check
on their own in the atomic_check path. Other drivers simply ignore the
issue. Perform LUT size validation in the generic place.

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20260106-drm-fix-lut-checks-v3-3-f7f979eb73c8@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>