ASoC: dapm: Ensure kcontrol list is initialised

Ensure that the recently added path kcontrol list is initialised otherwise
we may crash trying to delete routes that don't have kcontrols.

Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>

sound/soc/soc-dapm.c

@@ -2354,6 +2354,7 @@ static int snd_soc_dapm_add_path(struct snd_soc_dapm_context *dapm,
 	path->sink = wsink;
 	path->connected = connected;
 	INIT_LIST_HEAD(&path->list);
+	INIT_LIST_HEAD(&path->list_kcontrol);
 	INIT_LIST_HEAD(&path->list_source);
 	INIT_LIST_HEAD(&path->list_sink);