ssb: Add module.h to the real modules in drivers/ssb

The header cleanup means that module.h is no longer simply
everywhere.  So real modules need to actively include it.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index d0cbdb0..bb6317f 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -12,6 +12,7 @@
 
 #include <linux/delay.h>
 #include <linux/io.h>
+#include <linux/module.h>
 #include <linux/ssb/ssb.h>
 #include <linux/ssb/ssb_regs.h>
 #include <linux/ssb/ssb_driver_gige.h>