drm/amdgpu: Correct register used to clear fault status

Driver should write to fault_cntl registers to do
one-shot address/status clear.
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/mmhub_v1_8.c

@@ -569,7 +569,7 @@ static bool mmhub_v1_8_query_utcl2_poison_status(struct amdgpu_device *adev,
 	if (!amdgpu_sriov_vf(adev)) {
 		/* clear page fault status and address */
 		WREG32_P(SOC15_REG_OFFSET(MMHUB, hub_inst,
-			 regVM_L2_PROTECTION_FAULT_STATUS), 1, ~1);
+			 regVM_L2_PROTECTION_FAULT_CNTL), 1, ~1);
 	}
 
 	return fed;