greybus: core: place module_{init|exit}() right below the routines

To follow coding guidelines a bit :)
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/staging/greybus/core.c

@@ -244,6 +244,7 @@ static int __init gb_init(void)
 
 	return retval;
 }
+module_init(gb_init);
 
 static void __exit gb_exit(void)
 {
@@ -252,8 +253,6 @@ static void __exit gb_exit(void)
 	bus_unregister(&greybus_bus_type);
 	gb_debugfs_cleanup();
 }
-
-module_init(gb_init);
 module_exit(gb_exit);
 
 MODULE_LICENSE("GPL");