drm/amd/pm: support runtime PPTable update for dimgrey_cavefish

There is no need to reset DPM for PPTable uploading on
dimgrey_cavefish and PMFW can handle it, same as navy_flounder.

Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Jiansong Chen <Jiansong.Chen@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>