mn10300/cevt-mn10300: Migrate to new 'set-state' interface

Migrate mn10300 driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

We weren't doing anything in the ->set_mode() callback. So, this patch
doesn't provide any set-state callbacks.

Cc: David Howells <dhowells@redhat.com>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: linux-am33-list@redhat.com
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

arch/mn10300/kernel/cevt-mn10300.c

@@ -41,12 +41,6 @@ static int next_event(unsigned long delta,
 	return 0;
 }
 
-static void set_clock_mode(enum clock_event_mode mode,
-			   struct clock_event_device *evt)
-{
-	/* Nothing to do ...  */
-}
-
 static DEFINE_PER_CPU(struct clock_event_device, mn10300_clockevent_device);
 static DEFINE_PER_CPU(struct irqaction, timer_irq);
 
@@ -108,7 +102,6 @@ int __init init_clockevents(void)
 
 	cd->rating		= 200;
 	cd->cpumask		= cpumask_of(smp_processor_id());
-	cd->set_mode		= set_clock_mode;
 	cd->event_handler	= event_handler;
 	cd->set_next_event	= next_event;