cpufreq: Revert "cpufreq: Don't use cpu removed during cpufreq_driver_unregister"

This reverts commit 956f339 "cpufreq: Don't use cpu removed during
cpufreq_driver_unregister".

With the addition of the following commit, this change/variable is not
required any more:

commit b9ba2725343ae57add3f324dfa5074167f48de96
Author: Viresh Kumar <viresh.kumar@linaro.org>
Date:   Mon Jan 14 13:23:03 2013 +0000

    cpufreq: Simplify __cpufreq_remove_dev()

[rjw: Subject and changelog]
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq.c

@@ -47,9 +47,6 @@ static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
 #endif
 static DEFINE_SPINLOCK(cpufreq_driver_lock);
 
-/* Used when we unregister cpufreq driver */
-static struct cpumask cpufreq_online_mask;
-
 /*
  * cpu_policy_rwsem is a per CPU reader-writer semaphore designed to cure
  * all cpufreq/hotplug/workqueue/etc related lock issues.
@@ -993,7 +990,6 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
 	 * managing offline cpus here.
 	 */
 	cpumask_and(policy->cpus, policy->cpus, cpu_online_mask);
-	cpumask_and(policy->cpus, policy->cpus, &cpufreq_online_mask);
 
 	policy->user_policy.min = policy->min;
 	policy->user_policy.max = policy->max;
@@ -1176,7 +1172,6 @@ static int cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
 	if (unlikely(lock_policy_rwsem_write(cpu)))
 		BUG();
 
-	cpumask_clear_cpu(cpu, &cpufreq_online_mask);
 	retval = __cpufreq_remove_dev(dev, sif);
 	return retval;
 }
@@ -1918,8 +1913,6 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 	cpufreq_driver = driver_data;
 	spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
-	cpumask_setall(&cpufreq_online_mask);
-
 	ret = subsys_interface_register(&cpufreq_interface);
 	if (ret)
 		goto err_null_driver;