clockevents/source: Use u64 to make 32bit happy

unsigned long is not 64bit on 32bit machine.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

kernel/time/clockevents.c

@@ -197,7 +197,7 @@ EXPORT_SYMBOL_GPL(clockevents_register_device);
 static void clockevents_config(struct clock_event_device *dev,
 			       u32 freq)
 {
-	unsigned long sec;
+	u64 sec;
 
 	if (!(dev->features & CLOCK_EVT_FEAT_ONESHOT))
 		return;

kernel/time/clocksource.c

@@ -639,7 +639,7 @@ static void clocksource_enqueue(struct clocksource *cs)
  */
 void __clocksource_updatefreq_scale(struct clocksource *cs, u32 scale, u32 freq)
 {
-	unsigned long sec;
+	u64 sec;
 
 	/*
 	 * Calc the maximum number of seconds which we can run before