Replace hlt with halt()

There were instances of unneeded arch/hlt.h includes,
various hlt() calls that weren't supposed to exit (but
might have) and various forms of endless loops around
hlt() calls.

All these are sorted out now: unnecessary includes are
dropped, hlt() is uniformly replaced with halt() (except
in assembly, obviously).

Change-Id: I3d38fed6e8d67a28fdeb17be803d8c4b62d383c5
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: http://review.coreboot.org/7608
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/mainboard/lenovo/t60/romstage.c b/src/mainboard/lenovo/t60/romstage.c
index f0ebcbc..350c2de 100644
--- a/src/mainboard/lenovo/t60/romstage.c
+++ b/src/mainboard/lenovo/t60/romstage.c
@@ -35,6 +35,7 @@
 #include <pc80/mc146818rtc.h>
 #include <console/console.h>
 #include <cpu/x86/bist.h>
+#include <halt.h>
 #include "northbridge/intel/i945/i945.h"
 #include "northbridge/intel/i945/raminit.h"
 #include "southbridge/intel/i82801gx/i82801gx.h"
@@ -253,7 +254,7 @@
 	if (MCHBAR16(SSKPD) == 0xCAFE) {
 		printk(BIOS_DEBUG, "soft reset detected, rebooting properly\n");
 		outb(0x6, 0xcf9);
-		while (1) asm("hlt");
+		halt();
 	}
 
 	/* Perform some early chipset initialization required