I was going to say you can't but I went and checked my army book. The totem is Orcs only, but it doesn't say about putting it in a goblin unit with an Orc carrying... Also the Goblin only banners specifically states that they only affect Goblins.
Hmm, I would have said you can't but I can't see anything to support my arguement! So maybe you can... Sorry I'm not much help!