bcma: add module.h to the modular portions of this driver

This will ensure that it continues to build once we remove
the implicit module.h presence from everywhere later on.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 8c09c3e..70c84b9 100644
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -6,6 +6,7 @@
  */
 
 #include "bcma_private.h"
+#include <linux/module.h>
 #include <linux/bcma/bcma.h>
 #include <linux/slab.h>