[PATCH] Fix !CONFIG_SYSFS build

From: Maneesh Soni <maneesh@in.ibm.com>

The sysfs_rename_dir() interface was changed recently but I forgot to
change the definition if CONFIG_SYSFS is not defined.

include/linux/sysfs.h

@@ -80,9 +80,9 @@ static inline void sysfs_remove_dir(struct kobject * k)
 	;
 }
 
-static inline void sysfs_rename_dir(struct kobject * k, const char *new_name)
+static inline int sysfs_rename_dir(struct kobject * k, const char *new_name)
 {
-	;
+	return 0;
 }
 
 static inline int sysfs_create_file(struct kobject * k, const struct attribute * a)