src: Remove unused '<halt.h>'

Change-Id: I3037edf89c933f4f136ca61d6a5bce41126ec6b9
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44098
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/soc/qualcomm/sc7180/aop_load_reset.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <cbfs.h>
-#include <halt.h>
 #include <console/console.h>
 #include <timestamp.h>
 #include <soc/mmu.h>

src/southbridge/intel/bd82x6x/me.c

@@ -19,7 +19,6 @@
 #include <string.h>
 #include <delay.h>
 #include <elog.h>
-#include <halt.h>
 
 #include "me.h"
 #include "pch.h"

src/southbridge/intel/bd82x6x/me_8.x.c

@@ -19,7 +19,6 @@
 #include <string.h>
 #include <delay.h>
 #include <elog.h>
-#include <halt.h>
 
 #include "me.h"
 #include "pch.h"

src/southbridge/intel/lynxpoint/me_9.x.c

@@ -19,7 +19,6 @@
 #include <string.h>
 #include <delay.h>
 #include <elog.h>
-#include <halt.h>
 #include <stdlib.h>
 
 #include "chip.h"