Revert "drm/amd/display: Update to using new dccg callbacks"

[Why]
Revert updated DCCG wrappers due to regression

[How]
This reverts commit 680458d4.

Reviewed-by: Chris Park <chris.park@amd.com>
Signed-off-by: Hansen Dsouza <Hansen.Dsouza@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>