cifs: misc: fix spelling typo in comment

Fix spelling typo in comment.
Reported-by: k2ci <kernel-bot@kylinos.cn>
Signed-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/misc.c

@@ -824,7 +824,7 @@ cifs_close_deferred_file_under_dentry(struct cifs_tcon *tcon, const char *path)
 	free_dentry_path(page);
 }
 
-/* parses DFS refferal V3 structure
+/* parses DFS referral V3 structure
  * caller is responsible for freeing target_nodes
  * returns:
  * - on success - 0