ASoC: pcm: fix dpcm_path_put in dpcm runtime update

we need to release dapm widget list after dpcm_path_get in
soc_dpcm_runtime_update. otherwise, there will be potential memory
leak. add dpcm_path_put to fix it.
Signed-off-by: NQiao Zhou <zhouqiao@marvell.com>
Signed-off-by: NMark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org

sound/soc/soc-pcm.c

@@ -2069,6 +2069,7 @@ int soc_dpcm_runtime_update(struct snd_soc_card *card)
 			dpcm_be_disconnect(fe, SNDRV_PCM_STREAM_PLAYBACK);
 		}
 
+		dpcm_path_put(&list);
 capture:
 		/* skip if FE doesn't have capture capability */
 		if (!fe->cpu_dai->driver->capture.channels_min)