CPU: Add right qualifiers for alloc_frozen_cpus() and cpu_hotplug_pm_sync_init()

Add __init for functions alloc_frozen_cpus() and cpu_hotplug_pm_sync_init()
because they are only called during boot time.

Add static for function cpu_hotplug_pm_sync_init() because its scope is limited
in this file only.
Signed-off-by: NFenghua Yu <fenghua.yu@intel.com>
Acked-by: NSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>

kernel/cpu.c

@@ -470,7 +470,7 @@ void __ref enable_nonboot_cpus(void)
 	cpu_maps_update_done();
 }
 
-static int alloc_frozen_cpus(void)
+static int __init alloc_frozen_cpus(void)
 {
 	if (!alloc_cpumask_var(&frozen_cpus, GFP_KERNEL|__GFP_ZERO))
 		return -ENOMEM;
@@ -543,7 +543,7 @@ cpu_hotplug_pm_callback(struct notifier_block *nb,
 }
 
 
-int cpu_hotplug_pm_sync_init(void)
+static int __init cpu_hotplug_pm_sync_init(void)
 {
 	pm_notifier(cpu_hotplug_pm_callback, 0);
 	return 0;