PCI: get rid of pci_dev::{vendor,device}_compatible fields

The vendor_compatible and device_compatible fields in struct pci_dev aren't
used anywhere, and are somewhat pointless.  Assuming that these are
historical artifacts, remove them.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>