ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu

All the drivers are using, in their initialization function, the
for_each_possible_cpu macro.

Using for_each_online_cpu means the driver must handle the initialization
of the cpuidle device when a cpu is up which is not the case here.

Change the macro to for_each_possible_cpu as that fix the hotplug
initialization and make the initialization routine consistent with the
rest of the code in the different drivers.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/arm/mach-ux500/cpuidle.c

@@ -125,7 +125,7 @@ int __init ux500_idle_init(void)
 		return ret;
 	}
 
-	for_each_online_cpu(cpu) {
+	for_each_possible(cpu) {
 		device = &per_cpu(ux500_cpuidle_device, cpu);
 		device->cpu = cpu;
 		ret = cpuidle_register_device(device);
@@ -139,7 +139,7 @@ int __init ux500_idle_init(void)
 	return ret;
 
 out_unregister:
-	for_each_online_cpu(cpu) {
+	for_each_possible_cpu(cpu) {
 		device = &per_cpu(ux500_cpuidle_device, cpu);
 		cpuidle_unregister_device(device);
 	}