bootblock: Provide some common prototypes

The split of bootblock initialisation to cpu, northbridge and
southbridge is not specific to intel at all, create new header
<arch/bootblock.h> as AMD will want some of these too.

Change-Id: I702cc6bad4afee4f61acf58b9155608b28eb417e
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37429
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/cpu/intel/car/bootblock.c

@@ -12,7 +12,7 @@
  */
 
 #include <bootblock_common.h>
-#include <cpu/intel/car/bootblock.h>
+#include <arch/bootblock.h>
 #include <cpu/x86/bist.h>
 
 static uint32_t saved_bist;

src/cpu/intel/car/bootblock.h

@@ -1,21 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef _CPU_INTEL_CAR_BOOTBLOCK_H
-#define _CPU_INTEL_CAR_BOOTBLOCK_H
-
-void bootblock_early_cpu_init(void);
-void bootblock_early_northbridge_init(void);
-void bootblock_early_southbridge_init(void);
-
-#endif

src/cpu/intel/haswell/bootblock.c

@@ -13,6 +13,7 @@
 
 #include <stdint.h>
 #include <arch/cpu.h>
+#include <arch/bootblock.h>
 #include <cpu/x86/msr.h>
 #include <cpu/x86/mtrr.h>
 #include <arch/io.h>
@@ -21,7 +22,6 @@
 #include "haswell.h"
 
 #include <southbridge/intel/lynxpoint/pch.h>
-#include <cpu/intel/car/bootblock.h>
 
 static void set_flex_ratio_to_tdp_nominal(void)
 {

src/cpu/intel/model_206ax/bootblock.c

@@ -12,11 +12,11 @@
  */
 
 #include <stdint.h>
+#include <arch/bootblock.h>
 #include <arch/cpu.h>
 #include <cpu/x86/msr.h>
 #include <arch/io.h>
 #include <halt.h>
-#include <cpu/intel/car/bootblock.h>
 
 #include "model_206ax.h"