drm/amdgpu: call psp to program ih cntl in SR-IOV

call psp to program ih cntl in SR-IOV if supported

Signed-off-by: Trigger Huang <Trigger.Huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>