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>
diff --git a/kernel/power/process.c b/kernel/power/process.c
index eb2c88a..d6d2a10 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -85,7 +85,7 @@
 		if (!todo || time_after(jiffies, end_time))
 			break;
 
-		if (!pm_check_wakeup_events()) {
+		if (pm_wakeup_pending()) {
 			wakeup = true;
 			break;
 		}