clockevents/drivers/clps711x: Migrate to new 'set-state' interface

Migrate clps711x 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: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>

drivers/clocksource/clps711x-timer.c

@@ -61,11 +61,6 @@ static irqreturn_t clps711x_timer_interrupt(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static void clps711x_clockevent_set_mode(enum clock_event_mode mode,
-					 struct clock_event_device *evt)
-{
-}
-
 static int __init _clps711x_clkevt_init(struct clk *clock, void __iomem *base,
 					unsigned int irq)
 {
@@ -91,7 +86,6 @@ static int __init _clps711x_clkevt_init(struct clk *clock, void __iomem *base,
 	clkevt->name = "clps711x-clockevent";
 	clkevt->rating = 300;
 	clkevt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_C3STOP;
-	clkevt->set_mode = clps711x_clockevent_set_mode;
 	clkevt->cpumask = cpumask_of(0);
 	clockevents_config_and_register(clkevt, HZ, 0, 0);