ASoC: s6000: Use WARN_ON() instead of BUG_ON()

Use WARN_ON() and handle the error cases accordingly.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/s6000/s6000-pcm.c

@@ -90,7 +90,8 @@ static void s6000_pcm_enqueue_dma(struct snd_pcm_substream *substream)
 		return;
 	}
 
-	BUG_ON(period_size & 15);
+	if (WARN_ON(period_size & 15))
+		return;
 	s6dmac_put_fifo(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel),
 			src, dst, period_size);