ASoC: soc-core: accept zero format at snd_soc_runtime_set_dai_fmt()

Do nothing if format was zero at snd_soc_runtime_set_dai_fmt().
soc-core.c can be more simple code by this patch.

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

sound/soc/meson/meson-codec-glue.c

···
 	/* Replace link params with the input params */
 	rtd->dai_link->params = &in_data->params;
 
-	if (!in_data->fmt)
-		return 0;
-
 	return snd_soc_runtime_set_dai_fmt(rtd, in_data->fmt);
 }
 EXPORT_SYMBOL_GPL(meson_codec_glue_output_startup);

sound/soc/soc-core.c

···
 	unsigned int i;
 	int ret;
 
+	if (!dai_fmt)
+		return 0;
+
 	for_each_rtd_codec_dais(rtd, i, codec_dai) {
 		ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
 		if (ret != 0 && ret != -ENOTSUPP)
···
 		return ret;
 
 	snd_soc_runtime_get_dai_fmt(rtd);
-	if (dai_link->dai_fmt) {
-		ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
-		if (ret)
-			return ret;
-	}
+	ret = snd_soc_runtime_set_dai_fmt(rtd, dai_link->dai_fmt);
+	if (ret)
+		return ret;
 
 	/* add DPCM sysfs entries */
 	soc_dpcm_debugfs_add(rtd);