sound: Add module.h to the previously silent sound users

Lots of sound drivers were getting module.h via the implicit presence
of it in <linux/device.h> but we are going to clean that up.  So
fix up those users now.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/sound/soc/omap/zoom2.c b/sound/soc/omap/zoom2.c
index 7cf35c8..7641a7f 100644
--- a/sound/soc/omap/zoom2.c
+++ b/sound/soc/omap/zoom2.c
@@ -33,6 +33,7 @@
 
 /* Register descriptions for twl4030 codec part */
 #include <linux/mfd/twl4030-audio.h>
+#include <linux/module.h>
 
 #include "omap-mcbsp.h"
 #include "omap-pcm.h"