ARM: sa11x0: convert set_xxx_data() to register_xxx()

Only register devices if we have platform data for those which require
platform data.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-sa1100/lart.c

@@ -28,7 +28,7 @@ static struct mcp_plat_data lart_mcp_data = {
 
 static void __init lart_init(void)
 {
-	sa11x0_set_mcp_data(&lart_mcp_data);
+	sa11x0_register_mcp(&lart_mcp_data);
 }
 
 static struct map_desc lart_io_desc[] __initdata = {