fix the regression in ufs options parsing

A really dumb braino on rebasing and a dumber fuckup with managing #for-next

Fixes: b70cb459 ("ufs: convert ufs to the new mount API")
Fucked-up-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>