drm/amd/display: Refactor to move color helper into module

Refactor part 2 - Moving color helper into color module

The color module will need table defined in the helper in order to calculate
the logical regamma curve, and also to fully handle gamut remapping.

Signed-off-by: Anthony Koo <anthony.koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>