[PATCH -next] sound/oss/dmasound: fix 'dmasound_setup' defined but not used

[Miles Chen]

Hi Angelo,

> Hello Miles,
> I agree with Takashi, __maybe_unused looks way better.

No problem, I posted v2 (with __maybe_unused).
https://lore.kernel.org/lkml/20220414091940.2216-1-miles.chen@mediatek.com/

Thanks,
Miles

> 
> Regards,
> Angelo