clocksource: xtensa: Convert to clocksource_register_hz/khz

This converts the xtensa clocksource to use clocksource_register_hz/khz

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

CC: Chris Zankel <chris@zankel.net>
CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <johnstul@us.ibm.com>

arch/xtensa/kernel/time.c

@@ -41,14 +41,6 @@ static struct clocksource ccount_clocksource = {
 	.rating = 200,
 	.read = ccount_read,
 	.mask = CLOCKSOURCE_MASK(32),
-	/*
-	 * With a shift of 22 the lower limit of the cpu clock is
-	 * 1MHz, where NSEC_PER_CCOUNT is 1000 or a bit less than
-	 * 2^10: Since we have 32 bits and the multiplicator can
-	 * already take up as much as 10 bits, this leaves us with
-	 * remaining upper 22 bits.
-	 */
-	.shift = 22,
 };
 
 static irqreturn_t timer_interrupt(int irq, void *dev_id);
@@ -66,10 +58,7 @@ void __init time_init(void)
 	printk("%d.%02d MHz\n", (int)ccount_per_jiffy/(1000000/HZ),
 			(int)(ccount_per_jiffy/(10000/HZ))%100);
 #endif
-	ccount_clocksource.mult =
-		clocksource_hz2mult(CCOUNT_PER_JIFFY * HZ,
-				ccount_clocksource.shift);
-	clocksource_register(&ccount_clocksource);
+	clocksource_register_hz(&ccount_clocksource, CCOUNT_PER_JIFFY * HZ);
 
 	/* Initialize the linux timer interrupt. */