nb/intel/sandybridge: Drop raminit_native.h

After commit adaeb11021 (nb/intel/sandybridge: Clean up post Haswell SPD mapping API migration), no boards use this header anymore and it
no longer offers original content.

Adjust northbridge code #includes as needed and drop it.

Change-Id: I2785e920bd6188dbfc1a6157351083ec4a2526d0
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78785
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>

src/northbridge/intel/sandybridge/raminit_common.c

@@ -11,7 +11,6 @@
 #include <delay.h>
 #include <types.h>
 
-#include "raminit_native.h"
 #include "raminit_common.h"
 #include "raminit_tables.h"
 #include "sandybridge.h"

src/northbridge/intel/sandybridge/raminit_iosav.c

@@ -3,7 +3,6 @@
 #include <commonlib/helpers.h>
 #include <types.h>
 
-#include "raminit_native.h"
 #include "raminit_common.h"
 #include "raminit_tables.h"
 #include "sandybridge.h"

src/northbridge/intel/sandybridge/raminit_native.c

@@ -12,7 +12,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 
-#include "raminit_native.h"
+#include "sandybridge.h"
 #include "raminit_common.h"
 #include "raminit_tables.h"
 

src/northbridge/intel/sandybridge/raminit_native.h

@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#ifndef RAMINIT_NATIVE_H
-#define RAMINIT_NATIVE_H
-
-#include "sandybridge.h"
-#include <device/dram/ddr3.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-#endif /* RAMINIT_NATIVE_H */