h8300: Convert h8300 to use read/update_persistent_clock

This patch converts the h8300 architecture to use the generic
read_persistent_clock and update_persistent_clock interfaces, reducing
the amount of arch specific code we have to maintain, and allowing for
further cleanups in the future.

I have not built or tested this patch, so help from arch maintainers
would be appreciated.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <1267675049-12337-6-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/h8300/kernel/time.c

@@ -41,7 +41,7 @@ void h8300_timer_tick(void)
 	update_process_times(user_mode(get_irq_regs()));
 }
 
-void __init time_init(void)
+void read_persistent_clock(struct timespec *ts)
 {
 	unsigned int year, mon, day, hour, min, sec;
 
@@ -56,8 +56,12 @@ void __init time_init(void)
 #endif
 	if ((year += 1900) < 1970)
 		year += 100;
-	xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
-	xtime.tv_nsec = 0;
+	ts->tv_sec = mktime(year, mon, day, hour, min, sec);
+	ts->tv_nsec = 0;
+}
+
+void __init time_init(void)
+{
 
 	h8300_timer_setup();
 }