ASoC: dapm: Add support for hw_free on CODEC to CODEC links

Currently, on power down for a CODEC to CODEC DAI link we only call
digital_mute and shutdown. Provide a little more flexibility for drivers
by adding a call to hw_free as well.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-dapm.c

@@ -3737,25 +3737,30 @@ static int snd_soc_dai_link_event(struct snd_soc_dapm_widget *w,
 			ret = 0;
 		}
 
+		substream.stream = SNDRV_PCM_STREAM_CAPTURE;
 		snd_soc_dapm_widget_for_each_source_path(w, path) {
 			source = path->source->priv;
 
+			if (source->driver->ops->hw_free)
+				source->driver->ops->hw_free(&substream,
+							     source);
+
 			source->active--;
-			if (source->driver->ops->shutdown) {
-				substream.stream = SNDRV_PCM_STREAM_CAPTURE;
+			if (source->driver->ops->shutdown)
 				source->driver->ops->shutdown(&substream,
 							      source);
-			}
 		}
 
+		substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
 		snd_soc_dapm_widget_for_each_sink_path(w, path) {
 			sink = path->sink->priv;
 
+			if (sink->driver->ops->hw_free)
+				sink->driver->ops->hw_free(&substream, sink);
+
 			sink->active--;
-			if (sink->driver->ops->shutdown) {
-				substream.stream = SNDRV_PCM_STREAM_PLAYBACK;
+			if (sink->driver->ops->shutdown)
 				sink->driver->ops->shutdown(&substream, sink);
-			}
 		}
 		break;