cpufreq: pcc: Remove empty exit() callback

The exit() callback is optional, remove the empty one.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>

drivers/cpufreq/pcc-cpufreq.c

@@ -562,18 +562,12 @@ static int pcc_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	return result;
 }
 
-static int pcc_cpufreq_cpu_exit(struct cpufreq_policy *policy)
-{
-	return 0;
-}
-
 static struct cpufreq_driver pcc_cpufreq_driver = {
 	.flags = CPUFREQ_CONST_LOOPS,
 	.get = pcc_get_freq,
 	.verify = pcc_cpufreq_verify,
 	.target = pcc_cpufreq_target,
 	.init = pcc_cpufreq_cpu_init,
-	.exit = pcc_cpufreq_cpu_exit,
 	.name = "pcc-cpufreq",
 };