Revert "jfs: fix shift-out-of-bounds in dbJoin"

commit e42e29cc upstream.

This reverts commit cca974da.

The added sanity check is incorrect. BUDMIN is not the wrong value and
is too small.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>