drm/amd/pm: add smu pp_feature_mask callback for smu_v13_0_7

- set_pp_feature_mask
- get_pp_feature_mask

the pp_feature device node isn't working when
above callback functions aren't provided.

Signed-off-by: Yang Wang <KevinYang.Wang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>