drm/amdgpu: catch amdgpu_irq_add_id failure

Do not ignore amdgpu_irq_add_id return value while registering
VMC page fault interrupt.
Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c

@@ -720,6 +720,10 @@ static int gmc_v10_0_sw_init(void *handle)
 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_VMC,
 			      VMC_1_0__SRCID__VM_FAULT,
 			      &adev->gmc.vm_fault);
+
+	if (r)
+		return r;
+
 	r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_UTCL2,
 			      UTCL2_1_0__SRCID__FAULT,
 			      &adev->gmc.vm_fault);