versatile_pci: Put the host bridge PCI device at slot 29

On real hardware the host bridge appears as a PCI device in slot 29,
so make QEMU put its host bridge in that slot too.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Paul Brook <paul@codesourcery.com>

hw/pci-host/versatile.c

@@ -87,6 +87,8 @@ static void pci_vpb_init(Object *obj)
 
     object_initialize(&s->pci_dev, TYPE_VERSATILE_PCI_HOST);
     qdev_set_parent_bus(DEVICE(&s->pci_dev), BUS(&s->pci_bus));
+    object_property_set_int(OBJECT(&s->pci_dev), PCI_DEVFN(29, 0), "addr",
+                            NULL);
 }
 
 static void pci_vpb_realize(DeviceState *dev, Error **errp)