drm/amd/amdgpu: remove redundant flush_delayed_work

When using cancel_delayed_work_sync, there's no need
to flush_delayed_work first. This sequence can lead to
a redundant loop of work executing.
Signed-off-by: Jingwen Chen <Jingwen.Chen2@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -571,7 +571,6 @@ void amdgpu_virt_fini_data_exchange(struct amdgpu_device *adev)
 {
 	if (adev->virt.vf2pf_update_interval_ms != 0) {
 		DRM_INFO("clean up the vf2pf work item\n");
-		flush_delayed_work(&adev->virt.vf2pf_work);
 		cancel_delayed_work_sync(&adev->virt.vf2pf_work);
 		adev->virt.vf2pf_update_interval_ms = 0;
 	}