module: remove trailing whitespace

Fix checkpatch.pl warning:
ERROR: trailing whitespace
Signed-off-by: Anson Jacob <ansonjacob.aj@gmail.com>
Signed-off-by: Jessica Yu <jeyu@redhat.com>

include/linux/module.h

@@ -412,7 +412,7 @@ struct module {
 	/* Protected by RCU and/or module_mutex: use rcu_dereference() */
 	struct mod_kallsyms *kallsyms;
 	struct mod_kallsyms core_kallsyms;
-	
+
 	/* Section attributes */
 	struct module_sect_attrs *sect_attrs;