Add a function to cleanup at module exit and export
appropriate GPL string to enable moduler support
for the cppc_cpufreq driver.
Reported-by: NSrinivas Pandruvada <srinivas.pandruvada@intel.com>
Signed-off-by: NAshwin Chaugule <ashwin.chaugule@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>