umem: Fix match of pci_ids in umem driver

the pci device list for umem was not using PCI_DEVICE, so the
subvendor/subdevice fields were not set to ANY, so matching
didn't work properly.

Change to use PCI_DEVICE.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>