use PCI_SLOT() and PCI_FUNC() where appropriate instead of
direct use of bit operation.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>