ASoC: Add w->kcontrols, and populate it

Future changes will need reference to the kcontrol created for a given
kcontrol_new. Store the created kcontrol values now.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index 76714be..b25bf0f 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -474,6 +474,7 @@
 	/* kcontrols that relate to this widget */
 	int num_kcontrols;
 	const struct snd_kcontrol_new *kcontrol_news;
+	struct snd_kcontrol **kcontrols;
 
 	/* widget input and outputs */
 	struct list_head sources;