drivers/block/cpqarray.c: use pci_dev->revision

This driver uses PCI_CLASS_REVISION instead of PCI_REVISION_ID, so it
wasn't converted by commit 44c10138 ("PCI: Change all drivers to
use pci_device->revision").

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Acked-by: Mike Miller <mike.miller@hp.com>
Cc: Chirag Kantharia <chirag.kantharia@hp.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@google.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>