x86/PCI: Use x86_pci_root_bus_node() instead of get_mp_bus_to_node()

This replaces all uses of get_mp_bus_to_node() with x86_pci_root_bus_node().

I think these uses are all on root buses, except possibly for blind
probing, where NUMA node information is unimportant.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/x86/pci/acpi.c

@@ -503,7 +503,7 @@ struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
 		set_mp_bus_to_node(busnum, node);
 	else
 #endif
-		node = get_mp_bus_to_node(busnum);
+		node = x86_pci_root_bus_node(busnum);
 
 	if (node != -1 && !node_online(node))
 		node = -1;

arch/x86/pci/common.c

@@ -467,7 +467,7 @@ void pcibios_scan_root(int busnum)
 		printk(KERN_ERR "PCI: OOM, skipping PCI bus %02x\n", busnum);
 		return;
 	}
-	sd->node = get_mp_bus_to_node(busnum);
+	sd->node = x86_pci_root_bus_node(busnum);
 	x86_pci_root_bus_resources(busnum, &resources);
 	printk(KERN_DEBUG "PCI: Probing PCI hardware (bus %02x)\n", busnum);
 	bus = pci_scan_root_bus(NULL, busnum, &pci_root_ops, sd, &resources);