media: ov772x: Unregister async subdevice

As the media subdevice is registered with 'v4l2_async_register_subdev()'
unregister it at module removal time with
'v4l2_async_unregister_subdev()'
Signed-off-by: NJacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/ov772x.c

@@ -1328,7 +1328,7 @@ static int ov772x_remove(struct i2c_client *client)
 	clk_put(priv->clk);
 	if (priv->pwdn_gpio)
 		gpiod_put(priv->pwdn_gpio);
-	v4l2_device_unregister_subdev(&priv->subdev);
+	v4l2_async_unregister_subdev(&priv->subdev);
 	v4l2_ctrl_handler_free(&priv->hdl);
 
 	return 0;