Fix remap handling (again).

Fix remap handling (again).

I guess majors 253 and 254 are both right.
Fixed typo in bilink_first_up.

I'm seeing stuff like:

253,0    0       13    30.716486276 31815  Q   R 0 + 8 [mount]
253,0    0       14    30.718087082     3  C   R 0 + 8 [0]

Without any intervening stuff (remaps and gets and inserts and ...). So
added some support for this case.

(Note: This requires the kernel patch I submitted on 2007/02/15 to make
any sense, although this code will "work" in any event.)

Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>