virtio/s390: add missing \n to end of dev_err message

Trival fix, dev_err message is missing a \n, so add it.
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Message-Id: <20160927200844.16008-1-colin.king@canonical.com>
Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>

drivers/s390/virtio/virtio_ccw.c

@@ -454,7 +454,7 @@ static void virtio_ccw_del_vq(struct virtqueue *vq, struct ccw1 *ccw)
 	 * This may happen on device detach.
 	 */
 	if (ret && (ret != -ENODEV))
-		dev_warn(&vq->vdev->dev, "Error %d while deleting queue %d",
+		dev_warn(&vq->vdev->dev, "Error %d while deleting queue %d\n",
 			 ret, index);
 
 	vring_del_virtqueue(vq);