This is for static powergating and clockgating

v2: fix registers (Alex)
Signed-off-by: NLeo Liu <leo.liu@amd.com>
Reviewed-by: NJames Zhu <James.Zhu@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>