ASoC: Return error if the function does not support multi-cpu

Multi cpu is not supported by all functions yet. Add an error message
and return.

Suggested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200225133917.21314-6-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
index 392a1c5..50062eb 100644
--- a/sound/soc/soc-compress.c
+++ b/sound/soc/soc-compress.c
@@ -810,9 +810,10 @@ int snd_soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
 	int playback = 0, capture = 0;
 	int i;
 
-	if (rtd->num_codecs > 1) {
+	if (rtd->num_cpus > 1 ||
+	    rtd->num_codecs > 1) {
 		dev_err(rtd->card->dev,
-			"Compress ASoC: Multicodec not supported\n");
+			"Compress ASoC: Multi CPU/Codec not supported\n");
 		return -EINVAL;
 	}