ufs: fix nexstep dir block size

This patch fixes regression, introduced since 2.6.16.  NextStep variant of
UFS as OpenStep uses directory block size equals to 1024.  Without this
change, ufs_check_page fails in many cases.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Cc: Dave Bailey <dsbailey@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>