snd_hdac_add_chmap_ctls
int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx,
err = snd_hdac_add_chmap_ctls(pcm->pcm, pcm_idx, &spec->chmap);
EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);