drm/amdgpu: Ignore stop rlc on SRIOV environment.

For SRIOV, the guest driver should not do stop rlc. The host
handles programing RLC.

On SRIOV, the stop rlc will be hang (RLC related registers are
blocked by policy) when the RLCG interface is not enabled.
Reviewed-by: NYang Wang <kevinyang.wang@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NGavin Wan <Gavin.Wan@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c

@@ -1518,7 +1518,7 @@ static int smu_disable_dpms(struct smu_context *smu)
 	}
 
 	if (adev->ip_versions[GC_HWIP][0] >= IP_VERSION(9, 4, 2) &&
-	    adev->gfx.rlc.funcs->stop)
+	    !amdgpu_sriov_vf(adev) && adev->gfx.rlc.funcs->stop)
 		adev->gfx.rlc.funcs->stop(adev);
 
 	return ret;