cpufreq: Implement cpufreq_generic_suspend()
Multiple platforms need to set CPUs to a particular frequency before suspending the system, so provide a common infrastructure for them. Those platforms only need to point their ->suspend callback pointers to the generic routine. Tested-by: NStephen Warren <swarren@nvidia.com> Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org> [rjw: Changelog] Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
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