ASoC: soc-core: define soc_dpcm_debugfs_add() for non CONFIG_DEBUG_FS

soc_dpcm_debugfs_add() is implemented at soc-pcm.c under CONFIG_DEBUG_FS.
Thus, soc-core.c which is only user of it need to use CONFIG_DEBUG_FS, too.

This patch defines soc_dpcm_debugfs_add() for non CONFIG_DEBUG_FS case.
Then, we can remove #ifdef CONFIG_DEBUG_FS from soc-core.c
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/875zn9ahnv.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/soc-dpcm.h

@@ -142,9 +142,16 @@ void snd_soc_dpcm_be_set_state(struct snd_soc_pcm_runtime *be, int stream,
 
 /* internal use only */
 int soc_dpcm_be_digital_mute(struct snd_soc_pcm_runtime *fe, int mute);
-void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
 int soc_dpcm_runtime_update(struct snd_soc_card *);
 
+#ifdef CONFIG_DEBUG_FS
+void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd);
+#else
+static inline void soc_dpcm_debugfs_add(struct snd_soc_pcm_runtime *rtd)
+{
+}
+#endif
+
 int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
 	int stream, struct snd_soc_dapm_widget_list **list_);
 int dpcm_process_paths(struct snd_soc_pcm_runtime *fe,

sound/soc/soc-core.c

@@ -1487,11 +1487,9 @@ static int soc_probe_link_dais(struct snd_soc_card *card,
 	if (ret)
 		return ret;
 
-#ifdef CONFIG_DEBUG_FS
 	/* add DPCM sysfs entries */
 	if (dai_link->dynamic)
 		soc_dpcm_debugfs_add(rtd);
-#endif
 
 	num = rtd->num;