ufs: Fix warning from unlock_new_inode()

ufs: Fix warning from unlock_new_inode()

Commit 4b7c6745dad351f8e (ufs: deal with nfsd/iget races) introduced
unlock_new_inode() call into ufs_add_nondir(). However that function
gets called also from ufs_link() which hands it already initialized
inode and thus unlock_new_inode() complains. The problem is harmless but
annoying.

Fix the problem by opencoding necessary stuff in ufs_link()

Fixes: 4b7c6745dad351f8ed310f6e0e7972a4760d49a9
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>