qxl: fix bug with object eviction and update area

if the surface is evicted, this validation will happen
to the wrong place, I noticed this with other work I was
doing, haven't seen it go wrong in practice.

Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/qxl/qxl_ioctl.c

@@ -294,6 +294,7 @@ static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 		goto out;
 
 	if (!qobj->pin_count) {
+		qxl_ttm_placement_from_domain(qobj, qobj->type);
 		ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 				      true, false);
 		if (unlikely(ret))