drm/amd/powerplay: add new pp_psm infrastructure for vega12 (v2)

New psm infrastructure for vega12.

v2: rebase (Alex)

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
6 files changed