s390/sclp: Remove quiesce power management support

Power management support was removed for s390 with
commit 39421627 ("s390: remove broken hibernate / power management
support").

Remove leftover sclp quiesce-related power management code.
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

drivers/s390/char/sclp_quiesce.c

@@ -18,10 +18,6 @@
 
 #include "sclp.h"
 
-static void (*old_machine_restart)(char *);
-static void (*old_machine_halt)(void);
-static void (*old_machine_power_off)(void);
-
 /* Shutdown handler. Signal completion of shutdown by loading special PSW. */
 static void do_machine_quiesce(void)
 {
@@ -37,42 +33,15 @@ static void do_machine_quiesce(void)
 /* Handler for quiesce event. Start shutdown procedure. */
 static void sclp_quiesce_handler(struct evbuf_header *evbuf)
 {
-	if (_machine_restart != (void *) do_machine_quiesce) {
-		old_machine_restart = _machine_restart;
-		old_machine_halt = _machine_halt;
-		old_machine_power_off = _machine_power_off;
-		_machine_restart = (void *) do_machine_quiesce;
-		_machine_halt = do_machine_quiesce;
-		_machine_power_off = do_machine_quiesce;
-	}
+	_machine_restart = (void *) do_machine_quiesce;
+	_machine_halt = do_machine_quiesce;
+	_machine_power_off = do_machine_quiesce;
 	ctrl_alt_del();
 }
 
-/* Undo machine restart/halt/power_off modification on resume */
-static void sclp_quiesce_pm_event(struct sclp_register *reg,
-				  enum sclp_pm_event sclp_pm_event)
-{
-	switch (sclp_pm_event) {
-	case SCLP_PM_EVENT_RESTORE:
-		if (old_machine_restart) {
-			_machine_restart = old_machine_restart;
-			_machine_halt = old_machine_halt;
-			_machine_power_off = old_machine_power_off;
-			old_machine_restart = NULL;
-			old_machine_halt = NULL;
-			old_machine_power_off = NULL;
-		}
-		break;
-	case SCLP_PM_EVENT_FREEZE:
-	case SCLP_PM_EVENT_THAW:
-		break;
-	}
-}
-
 static struct sclp_register sclp_quiesce_event = {
 	.receive_mask = EVTYP_SIGQUIESCE_MASK,
 	.receiver_fn = sclp_quiesce_handler,
-	.pm_event_fn = sclp_quiesce_pm_event
 };
 
 /* Initialize quiesce driver. */