PM / devfreq: add support for suspend/resume of a devfreq device
The patch prepares devfreq device for handling suspend/resume
functionality. The new fields will store needed information during this
process. Devfreq framework handles opp-suspend DT entry and there is no
need of modyfications in the drivers code. It uses atomic variables to
make sure no race condition affects the process.
Suggested-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de> Suggested-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>