cpufreq: update driver_data->flags only if we are registering driver

We should first check if a cpufreq driver is already registered or not
before updating driver_data->flags.

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