PM / Wakeup: Replace pm_check_wakeup_events() with pm_wakeup_pending()

To avoid confusion with the meaning and return value of
pm_check_wakeup_events() replace it with pm_wakeup_pending() that
will work the other way around (ie. return true when system-wide
power transition should be aborted).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

drivers/base/power/main.c

@@ -1056,7 +1056,7 @@ static int dpm_prepare(pm_message_t state)
 		if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
 			pm_wakeup_event(dev, 0);
 
-		if (!pm_check_wakeup_events()) {
+		if (pm_wakeup_pending()) {
 			pm_runtime_put_sync(dev);
 			error = -EBUSY;
 		} else {