udf: Convert udf_rename() to new directory iteration code

[ Upstream commit e9109a92 ]

Convert udf_rename() to use new directory iteration code.

Reported-by:  <syzbot+0eaad3590d65102b9391@syzkaller.appspotmail.com>
Reported-by:  <syzbot+b7fc73213bc2361ab650@syzkaller.appspotmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
[cascardo: remove the call to udf_rename_tag per commit
 27ab3385 ("udf: Fix bogus checksum computation in udf_rename()")]
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>