drm/amdgpu: only flush hotplug work without DC

since hotplug_work is initialized under the case of
no dc support
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -257,6 +257,7 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 	r = drm_irq_install(adev->ddev, adev->ddev->pdev->irq);
 	if (r) {
 		adev->irq.installed = false;
+		if (!amdgpu_device_has_dc_support(adev))
 			flush_work(&adev->hotplug_work);
 		cancel_work_sync(&adev->reset_work);
 		return r;
@@ -282,6 +283,7 @@ void amdgpu_irq_fini(struct amdgpu_device *adev)
 		adev->irq.installed = false;
 		if (adev->irq.msi_enabled)
 			pci_disable_msi(adev->pdev);
+		if (!amdgpu_device_has_dc_support(adev))
 			flush_work(&adev->hotplug_work);
 		cancel_work_sync(&adev->reset_work);
 	}