clocksource/drivers/arc_timer: Remove duplicate error message

The function arc_get_timer_clk() prints an error message if it fails,
remove the second error message if the function fails.

Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200429151223.3120-1-zhengdejin5@gmail.com

drivers/clocksource/arc_timer.c

@@ -334,10 +334,8 @@ static int __init arc_clockevent_setup(struct device_node *node)
 	}
 
 	ret = arc_get_timer_clk(node);
-	if (ret) {
-		pr_err("clockevent: missing clk\n");
+	if (ret)
 		return ret;
-	}
 
 	/* Needs apriori irq_set_percpu_devid() done in intc map function */
 	ret = request_percpu_irq(arc_timer_irq, timer_irq_handler,