Merge branch 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq

Pull devfreq framework changes for v4.21 from MyungJoo Ham:

"This includes the suspend-frequency support for devfreq, which is
 similar with suspend_freq in cpufreq."

* 'for-next' of https://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq:
  PM / devfreq: add devfreq_suspend/resume() functions
  PM / devfreq: add support for suspend/resume of a devfreq device
  PM / devfreq: refactor set_target frequency function