[ARM] Kill build warnings for Integrator PCI V3 driver.

arch/arm/mach-integrator/pci_v3.c

@@ -31,6 +31,7 @@
 #include <linux/init.h>
 
 #include <asm/hardware.h>
+#include <asm/io.h>
 #include <asm/irq.h>
 #include <asm/system.h>
 #include <asm/mach/pci.h>
@@ -295,7 +296,7 @@ static int v3_read_config(struct pci_bus *bus, unsigned int devfn, int where,
 		v = __raw_readw(addr);
 		break;
 
-	case 4:
+	default:
 		v = __raw_readl(addr);
 		break;
 	}