clocksource: um: Convert to clocksource_register_hz/khz

This converts the um clocksource to use clocksource_register_hz/khz

This is untested, so any assistance in testing would be appreciated!

CC: Jeff Dike <jdike@addtoit.com>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>

arch/um/kernel/time.c

@@ -75,8 +75,6 @@ static struct clocksource itimer_clocksource = {
 	.rating		= 300,
 	.read		= itimer_read,
 	.mask		= CLOCKSOURCE_MASK(64),
-	.mult		= 1000,
-	.shift		= 0,
 	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
 };
 
@@ -94,9 +92,9 @@ static void __init setup_itimer(void)
 		clockevent_delta2ns(60 * HZ, &itimer_clockevent);
 	itimer_clockevent.min_delta_ns =
 		clockevent_delta2ns(1, &itimer_clockevent);
-	err = clocksource_register(&itimer_clocksource);
+	err = clocksource_register_hz(&itimer_clocksource, USEC_PER_SEC);
 	if (err) {
-		printk(KERN_ERR "clocksource_register returned %d\n", err);
+		printk(KERN_ERR "clocksource_register_hz returned %d\n", err);
 		return;
 	}
 	clockevents_register_device(&itimer_clockevent);