ASoC: soc-dai: add snd_soc_dai_hw_free()

Current ALSA SoC is directly using dai->driver->ops->xxx,
thus, it has deep nested bracket, and it makes code unreadable.
This patch adds new snd_soc_dai_hw_free() and use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87y30qhn4w.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-dai.c

@@ -282,3 +282,10 @@ int snd_soc_dai_hw_params(struct snd_soc_dai *dai,
 
 	return 0;
 }
+
+void snd_soc_dai_hw_free(struct snd_soc_dai *dai,
+			 struct snd_pcm_substream *substream)
+{
+	if (dai->driver->ops->hw_free)
+		dai->driver->ops->hw_free(substream, dai);
+}