avr32: Fix typo in read_persistent_clock()

Fix fallout from the persistent_clock changes.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Cc: John Stultz <johnstul@us.ibm.com>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/avr32/kernel/time.c

@@ -112,7 +112,7 @@ static struct clock_event_device comparator = {
 
 void read_persistent_clock(struct timespec *ts)
 {
-	ts->tv.sec = mktime(2007, 1, 1, 0, 0, 0);
+	ts->tv_sec = mktime(2007, 1, 1, 0, 0, 0);
 	ts->tv_nsec = 0;
 }