[media] vim2m: return error if driver registration fails

Don't hide the error code.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/platform/vim2m.c

@@ -1074,7 +1074,7 @@ static int __init vim2m_init(void)
 	if (ret)
 		platform_device_unregister(&vim2m_pdev);
 
-	return 0;
+	return ret;
 }
 
 module_init(vim2m_init);