KVM: Fix preemption counter leak in kvm_timer_init()

#ifdef CONFIG_CPU_FREQ

		struct cpufreq_policy policy;

		memset(&policy, 0, sizeof(policy));

		cpufreq_get_policy(&policy, get_cpu());

		cpu = get_cpu();

		cpufreq_get_policy(&policy, cpu);

		if (policy.cpuinfo.max_freq)

			max_tsc_khz = policy.cpuinfo.max_freq;

		put_cpu();

#endif

		cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,

					  CPUFREQ_TRANSITION_NOTIFIER);