drm/amd/display: Remove DCCG registers not needed in DCN42

drm/amd/display: Remove DCCG registers not needed in DCN42

[why]

Some resources that exist in the DCN block are not needed and shouldn't
be used.

[how]

Remove defines from register lists.

Reviewed-by: Ovidiu (Ovi) Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Matthew Stewart <Matthew.Stewart2@amd.com>
Signed-off-by: George Zhang <george.zhang@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit dac8aa629a45e34027444f74d3b86b6f104b024c)