ARM: Orion5x: Fix warnings when using C=1.

Add missing include files, missing static keyword, and use NULL instead
of 0, in order to fix warnings when compiling with C=1.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

arch/arm/mach-orion5x/ts78xx-setup.c

@@ -57,7 +57,7 @@ static struct map_desc ts78xx_io_desc[] __initdata = {
 	},
 };
 
-void __init ts78xx_map_io(void)
+static void __init ts78xx_map_io(void)
 {
 	orion5x_map_io();
 	iotable_init(ts78xx_io_desc, ARRAY_SIZE(ts78xx_io_desc));