sysfs: sysfs_link_sibling(): fix typo in comment

Fix a typo subling->sibling in the comment of sysfs_link_sibling().

Signed-off-by: Warner Wang <warner.wang@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index e8e0e71..17c9a70 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -74,7 +74,7 @@
 }
 
 /**
- *	sysfs_link_subling - link sysfs_dirent into sibling rbtree
+ *	sysfs_link_sibling - link sysfs_dirent into sibling rbtree
  *	@sd: sysfs_dirent of interest
  *
  *	Link @sd into its sibling rbtree which starts from