[POWERPC] celleb: Fix support for multiple PCI domains

Celleb has multiple PCI host bridges (phbs).  Previous boot logic gives
non-overlapped bus IDs between PCI host bridges so you can identify
PHB by bus ID.  But newer boot logic gives same bus ID between PHBs (it
gives bus ID 0 as root bus.) So we have to set 'phb->buid' as
non-zero.
Signed-off-by: NKou Ishizaki <kou.ishizaki@toshiba.co.jp>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

arch/powerpc/platforms/celleb/pci.c

@@ -457,6 +457,7 @@ int __devinit celleb_setup_phb(struct pci_controller *phb)
 
 	pr_debug("PCI: celleb_setup_phb() %s\n", name);
 	phb_set_bus_ranges(dev, phb);
+	phb->buid = 1;
 
 	if (strcmp(name, "epci") == 0) {
 		phb->ops = &celleb_epci_ops;