powerpc/pci: Use for_each_pci_bridge() helper

Use for_each_pci_bridge() helper to make the code slightly cleaner.  No
functional change intended.

Requires: 24a0c654 ("PCI: Add for_each_pci_bridge() helper")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/pci-hotplug.c

@@ -134,11 +134,8 @@ void pci_hp_add_devices(struct pci_bus *bus)
 		pcibios_setup_bus_devices(bus);
 		max = bus->busn_res.start;
 		for (pass = 0; pass < 2; pass++) {
-			list_for_each_entry(dev, &bus->devices, bus_list) {
-				if (pci_is_bridge(dev))
-					max = pci_scan_bridge(bus, dev,
-							      max, pass);
-			}
+			for_each_pci_bridge(dev, bus)
+				max = pci_scan_bridge(bus, dev, max, pass);
 		}
 	}
 	pcibios_finish_adding_to_bus(bus);

arch/powerpc/kernel/pci_of_scan.c

@@ -369,11 +369,8 @@ static void __of_scan_bus(struct device_node *node, struct pci_bus *bus,
 	pcibios_setup_bus_devices(bus);
 
 	/* Now scan child busses */
-	list_for_each_entry(dev, &bus->devices, bus_list) {
-		if (pci_is_bridge(dev)) {
+	for_each_pci_bridge(dev, bus)
 		of_scan_pci_bridge(dev);
-		}
-	}
 }
 
 /**