ASoC: Fix idma build after update for channel count check

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c
index 3ba6aba..c227c31 100644
--- a/sound/soc/samsung/idma.c
+++ b/sound/soc/samsung/idma.c
@@ -398,6 +398,7 @@
 	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
 		ret = preallocate_idma_buffer(pcm,
 				SNDRV_PCM_STREAM_PLAYBACK);
+	}
 
 	return ret;
 }