ASoC: core utils: Dont set DMA params for BE substreams

BE substreams dont require dummy DMA configs so dont set any.
Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/soc-utils.c

@@ -75,6 +75,10 @@ static const struct snd_pcm_hardware dummy_dma_hardware = {
 
 static int dummy_dma_open(struct snd_pcm_substream *substream)
 {
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+	/* BE's dont need dummy params */
+	if (!rtd->dai_link->no_pcm)
 		snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware);
 
 	return 0;