ALSA: ASoC: Add missing includes

Ensure that DAIs are prototyped in the codec drivers that define them.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/sound/soc/codecs/wm9712.c b/sound/soc/codecs/wm9712.c
index d9789f1..28ac66f 100644
--- a/sound/soc/codecs/wm9712.c
+++ b/sound/soc/codecs/wm9712.c
@@ -22,6 +22,7 @@
 #include <sound/initval.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
+#include "wm9712.h"
 
 #define WM9712_VERSION "0.4"