cpufreq: longhaul: Make array speeds static const

Don't populate the read-only array speeds on the stack but instead
make it static. Also makes the object code a little smaller. Replace
hard-coded loop array bounds with ARRAY_SIZE.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/longhaul.c

@@ -407,10 +407,10 @@ static int guess_fsb(int mult)
 {
 	int speed = cpu_khz / 1000;
 	int i;
-	int speeds[] = { 666, 1000, 1333, 2000 };
+	static const int speeds[] = { 666, 1000, 1333, 2000 };
 	int f_max, f_min;
 
-	for (i = 0; i < 4; i++) {
+	for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 		f_max = ((speeds[i] * mult) + 50) / 100;
 		f_max += (ROUNDING / 2);
 		f_min = f_max - ROUNDING;