ARM/PCI: Use list_for_each_entry() for bus traversal

Replace list_for_each() + pci_bus_b() with list_for_each_entry().

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c
index 317da88..004670e 100644
--- a/arch/arm/kernel/bios32.c
+++ b/arch/arm/kernel/bios32.c
@@ -57,13 +57,10 @@
 
 void pcibios_report_status(u_int status_mask, int warn)
 {
-	struct list_head *l;
+	struct pci_bus *bus;
 
-	list_for_each(l, &pci_root_buses) {
-		struct pci_bus *bus = pci_bus_b(l);
-
+	list_for_each_entry(bus, &pci_root_buses, node)
 		pcibios_bus_report_status(bus, status_mask, warn);
-	}
 }
 
 /*