ASoC: fix 0-day warnings with snd_soc_new_compress()

All conditionally-defined routines in include/sound/soc.h expose a
static inline fallback to avoid 0-day warnings and compilation issues,
except snd_soc_new_compress().

Fixes: 5db6aab6f36f ('ASoC: topology: Add support for compressed PCMs')
Signed-off-by: Pierre-Louis Bossart <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

include/sound/soc.h

···
 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num);
 #ifdef CONFIG_SND_SOC_COMPRESS
 int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num);
+#else
+static inline int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
+{
+	return 0;
+}
 #endif
 
 void snd_soc_disconnect_sync(struct device *dev);