hw/versatile: realize the PCI root bus as part of the versatile init

'Realize' the PCI root bus manually since the 'realize' mechanism
does not propagate to child devices yet.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

hw/pci-host/versatile.c

@@ -455,6 +455,7 @@ static void pci_vpb_realize(DeviceState *dev, Error **errp)
     }
 
     /* TODO Remove once realize propagates to child devices. */
+    object_property_set_bool(OBJECT(&s->pci_bus), true, "realized", errp);
     object_property_set_bool(OBJECT(&s->pci_dev), true, "realized", errp);
 }