Refactor bootblock initialisation

Makes it a bit easier to implement mainboard-specific behaviour
while executing the bootblock.

Change-Id: I04e87f89efb4fad1c0e20b62ea6a50329a286205
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1844
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/arch/x86/init/bootblock_simple.c b/src/arch/x86/init/bootblock_simple.c
index fd9ba22..204636e 100644
--- a/src/arch/x86/init/bootblock_simple.c
+++ b/src/arch/x86/init/bootblock_simple.c
@@ -3,9 +3,7 @@
 static void main(unsigned long bist)
 {
 	if (boot_cpu()) {
-		bootblock_northbridge_init();
-		bootblock_southbridge_init();
-		bootblock_cpu_init();
+		bootblock_mainboard_init();
 
 #if CONFIG_USE_OPTION_TABLE
 		sanitize_cmos();