cpufreq: dt: Implement online/offline() callbacks

Implement the light-weight tear down and bring up helpers to reduce the
amount of work to do on CPU offline/online operation.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar 2019-02-12 12:36:47 +05:30 • committed by Rafael J. Wysocki
commit 263abfe74b