ASoC: Fix DAPM sync for TLV320AIC3x custom DAPM widget

We really should be doing this in the core, not in a driver...

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Tested-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
diff --git a/include/sound/soc-dapm.h b/include/sound/soc-dapm.h
index bfefc16..17a4c17 100644
--- a/include/sound/soc-dapm.h
+++ b/include/sound/soc-dapm.h
@@ -381,6 +381,9 @@
 int snd_soc_dapm_ignore_suspend(struct snd_soc_dapm_context *dapm,
 				const char *pin);
 
+/* Mostly internal - should not normally be used */
+void dapm_mark_dirty(struct snd_soc_dapm_widget *w, const char *reason);
+
 /* dapm widget types */
 enum snd_soc_dapm_type {
 	snd_soc_dapm_input = 0,		/* input pin */