drm/amdgpu/display: hook renoir dc to pplib funcs

enable dc get dmp clock table and set dcn watermarks
via pplib.

Signed-off-by: Hersen Wu <hersenxs.wu@amd.com>
Reviewed-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>