usb: gadget: uvc: memory leak in uvcg_frame_make()

We need to add a kfree(h) on an error path.
Acked-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/function/uvc_configfs.c

@@ -1300,6 +1300,7 @@ static struct config_item *uvcg_frame_make(struct config_group *group,
 		h->fmt_type = UVCG_MJPEG;
 	} else {
 		mutex_unlock(&opts->lock);
+		kfree(h);
 		return ERR_PTR(-EINVAL);
 	}
 	++fmt->num_frames;