cpufreq: Remove cpufreq_generic_exit()

cpufreq_generic_exit() is empty now and can be deleted.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/sc520_freq.c

@@ -93,7 +93,6 @@ static struct cpufreq_driver sc520_freq_driver = {
 	.verify	= cpufreq_generic_frequency_table_verify,
 	.target_index = sc520_freq_target,
 	.init	= sc520_freq_cpu_init,
-	.exit	= cpufreq_generic_exit,
 	.name	= "sc520_freq",
 	.attr	= cpufreq_generic_attr,
 };