Slot present bit is cleared apparently for each device. Hotplug and non
hotplug devices should not mix normally, and we only set the bit when we
add a device so it should all work out, but it's more robust to
explicitly account for more than one device per slot.
Acked-by: NAlex Williamson <alex.williamson@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>