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>

src/southbridge/intel/fsp_bd82x6x/me.c

@@ -29,7 +29,6 @@
  */
 
 #include <arch/acpi.h>
-#include <arch/hlt.h>
 #include <arch/io.h>
 #include <console/console.h>
 #include <device/pci_ids.h>
@@ -37,6 +36,7 @@
 #include <string.h>
 #include <delay.h>
 #include <elog.h>
+#include <halt.h>
 
 #ifndef __SMM__
 # include <device/device.h>
@@ -485,7 +485,7 @@ int mkhi_global_reset(void)
 	/* Send request and wait for response */
 	if (mei_sendrecv(&mei, &mkhi, &reset, NULL, 0) < 0) {
 		/* No response means reset will happen shortly... */
-		hlt();
+		halt();
 	}
 
 	/* If the ME responded it rejected the reset request */