drm/amdgpu: disable clock/power gating for SRIOV

and disable MC resum in VCN2.0 as well
those are not concerned by VF driver

Singed-off-by: darlington Opara <darlington.opara@amd.com>
Signed-off-by: Jinage Zhao <jiange.zhao@amd.com>
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>