i82801gx: smihandle: sync with southbridge/intel/bd82x6x/smihandler.c

Change-Id: Ic725b169061bd426aa8206dc1d6d31e67cc639f2
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Reviewed-on: http://review.coreboot.org/3304
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/southbridge/intel/i82801gx/smihandler.c

@@ -20,6 +20,7 @@
  */
 
 #include <types.h>
+#include <arch/hlt.h>
 #include <arch/io.h>
 #include <console/console.h>
 #include <cpu/x86/cache.h>
@@ -345,6 +346,9 @@ static void southbridge_smi_sleep(unsigned int node, smm_state_save_area_t *stat
 	 */
 	outl(reg32 | SLP_EN, pmbase + PM1_CNT);
 
+	/* Make sure to stop executing code here for S3/S4/S5 */
+	if (slp_typ > 1)
+		hlt();
 	/* In most sleep states, the code flow of this function ends at
 	 * the line above. However, if we entered sleep state S1 and wake
 	 * up again, we will continue to execute code in this function.