ASoC: expand snd_soc_dpcm_mutex_lock/unlock()

soc-pcm.c has snd_soc_dpcm_mutex_lock/unlock(),
but other files can't use it because it is static function.

It requests snd_soc_pcm_runtime as parameter (A), but sometimes we
want to use it by snd_soc_card (B).

(A)	static inline void snd_soc_dpcm_mutex_lock(struct snd_soc_pcm_runtime *rtd)
	{
		mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
	}			   ^^^^^^^^^

(B)	mutex_lock_nested(&card->pcm_mutex, card->pcm_subclass);
			   ^^^^

We want to use it with both "rtd" and "card" for dapm lock/unlock.
To enable it, this patch uses _Generic macro.

This patch makes snd_soc_dpcm_mutex_{un}lock() global function, and use it on
each files.

Signed-off-by: Kuninori Morimoto <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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