cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET

cpufreq: Introduce CPUFREQ_GOV_STRICT_TARGET

commit 218f66870181bec7aaa6e3c72f346039c590c3c2 upstream.

Introduce a new governor flag, CPUFREQ_GOV_STRICT_TARGET, for the
governors that want the target frequency to be set exactly to the
given value without leaving any room for adjustments on the hardware
side and set this flag for the powersave and performance governors.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>