NFS: Fix a typo in nfs_rename()

On successful rename, the "old_dentry" is retained and is attached to
the "new_dir", so we need to call nfs_set_verifier() accordingly.
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: NAnna Schumaker <Anna.Schumaker@Netapp.com>

fs/nfs/dir.c

@@ -2057,7 +2057,7 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		 * should mark the directories for revalidation.
 		 */
 		d_move(old_dentry, new_dentry);
-		nfs_set_verifier(new_dentry,
+		nfs_set_verifier(old_dentry,
 					nfs_save_change_attribute(new_dir));
 	} else if (error == -ENOENT)
 		nfs_dentry_handle_enoent(old_dentry);