static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
				 struct snd_pcm_group *new_group)
{
	substream->group = new_group;
	list_move(&substream->link_list, &new_group->substreams);
}
static void snd_pcm_group_assign(struct snd_pcm_substream *substream,
				 struct snd_pcm_group *new_group)
{
	substream->group = new_group;
	list_move(&substream->link_list, &new_group->substreams);
}