clockevents: Fix kernel messages split across multiple lines

Convert the clockevents driver from old-style printk() to pr_info() and
pr_cont(), to fix split kernel messages like below:

    Clockevents: could not switch to one-shot mode:
     dummy_timer is not functional.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: https://lkml.kernel.org/r/1522942018-14471-1-git-send-email-geert%2Brenesas@glider.be

kernel/time/tick-oneshot.c

@@ -82,15 +82,14 @@ int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *))
 	if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) ||
 		    !tick_device_is_functional(dev)) {
 
-		printk(KERN_INFO "Clockevents: "
-		       "could not switch to one-shot mode:");
+		pr_info("Clockevents: could not switch to one-shot mode:");
 		if (!dev) {
-			printk(" no tick device\n");
+			pr_cont(" no tick device\n");
 		} else {
 			if (!tick_device_is_functional(dev))
-				printk(" %s is not functional.\n", dev->name);
+				pr_cont(" %s is not functional.\n", dev->name);
 			else
-				printk(" %s does not support one-shot mode.\n",
+				pr_cont(" %s does not support one-shot mode.\n",
 					dev->name);
 		}
 		return -EINVAL;