pci: fix pci_find_bus() typo in c021f8e65f5009a5ab5711d9d5326fcab553ef1c. comparison fix. Cc: Blue Swirl <blauwirbel@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>