fs: rename "rename2" i_op to "rename"

Generated patch:

sed -i "s/\.rename2\t/\.rename\t\t/" `git grep -wl rename2`
sed -i "s/\brename2\b/rename/g" `git grep -wl rename2`

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/ufs/namei.c

@@ -337,5 +337,5 @@ const struct inode_operations ufs_dir_inode_operations = {
 	.mkdir		= ufs_mkdir,
 	.rmdir		= ufs_rmdir,
 	.mknod		= ufs_mknod,
-	.rename2	= ufs_rename,
+	.rename		= ufs_rename,
 };