drm/amd/display: Implement DePQ for DCN2

[Why]
Need support for more color management in 10bit
surface.

[How]
Provide support for DePQ for 10bit surface

Signed-off-by: Reza Amini <Reza.Amini@amd.com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>