time: Use ARRAY_SIZE macro in timecompare.c

Replace sizeof(buffer)/sizeof(buffer[0]) with ARRAY_SIZE(buffer) in
kernel/time/timecompare.c

Signed-off-by: Nikitas Angelinas <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Thomas Gleixner <[e-mail]>

kernel/time/timecompare.c

···
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/math64.h>
+#include <linux/kernel.h>
 
 /*
  * fixed point arithmetic scale factor for skew
···
 	int index;
 	int num_samples = sync->num_samples;
 
-	if (num_samples > sizeof(buffer)/sizeof(buffer[0])) {
+	if (num_samples > ARRAY_SIZE(buffer)) {
 		samples = kmalloc(sizeof(*samples) * num_samples, GFP_ATOMIC);
 		if (!samples) {
 			samples = buffer;
-			num_samples = sizeof(buffer)/sizeof(buffer[0]);
+			num_samples = ARRAY_SIZE(buffer);
 		}
 	} else {
 		samples = buffer;