[POWERPC] Don't special case pci_domain_nr() for iSeries

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/platforms/iseries/pci.c

@@ -673,6 +673,8 @@ void __init iSeries_pcibios_init(void)
 		phb = pcibios_alloc_controller(node);
 		if (phb == NULL)
 			continue;
+		/* All legacy iSeries PHBs are in domain zero */
+		phb->global_number = 0;
 
 		phb->pci_mem_offset = bus;
 		phb->first_busno = bus;