drm/amdgpu: do not register df_mca interrupt in certain config

df/mca ras is not managed by gpu driver when gpu
is connected to cpu through xgmi. gpu driver should
register x86 mca notifier for umc ras error
notification

Signed-off-by: Hawking Zhang <[e-mail]>
Reviewed-by: Dennis Li <[e-mail]>
Reviewed-by: John Clements <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

···
 	adev->gmc.vm_fault.num_types = 1;
 	adev->gmc.vm_fault.funcs = &gmc_v9_0_irq_funcs;
 
-	if (!amdgpu_sriov_vf(adev)) {
+	if (!amdgpu_sriov_vf(adev) &&
+	    !adev->gmc.xgmi.connected_to_cpu) {
 		adev->gmc.ecc_irq.num_types = 1;
 		adev->gmc.ecc_irq.funcs = &gmc_v9_0_ecc_funcs;
 	}
···
 	if (r)
 		return r;
 
-	if (!amdgpu_sriov_vf(adev)) {
+	if (!amdgpu_sriov_vf(adev) &&
+	    !adev->gmc.xgmi.connected_to_cpu) {
 		/* interrupt sent to DF. */
 		r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_DF, 0,
 				      &adev->gmc.ecc_irq);