linux-phytec-ti

drm/tidss: add 8/10 bit gamma support

J721E DSS has 10 bit gamma support, instead of 8 bit as K2G and AM6
does.

To prepare for J721E DSS, add support for the two different types of
gamma tables.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Benoit Parrot <bparrot@ti.com>