ASoC: msm: qdsp6v2: Clear pass-through mode on routing close

On close of the routing driver clear the pass-through
mode flag of the backend dai.

Change-Id: Ie09d687bf418d77e8442da6da7ced3cc3788a5da
Signed-off-by: Ben Romberger <bromberg@codeaurora.org>
diff --git a/sound/soc/msm/qdsp6v2/msm-pcm-routing-v2.c b/sound/soc/msm/qdsp6v2/msm-pcm-routing-v2.c
index c9b4fcf..6d20747 100644
--- a/sound/soc/msm/qdsp6v2/msm-pcm-routing-v2.c
+++ b/sound/soc/msm/qdsp6v2/msm-pcm-routing-v2.c
@@ -14125,6 +14125,7 @@
 	bedai->active = 0;
 	bedai->sample_rate = 0;
 	bedai->channel = 0;
+	bedai->passthr_mode = LEGACY_PCM;
 	mutex_unlock(&routing_lock);
 
 	return 0;