Some drivers (like i915/drm) needs to get the accounted suspended time.
pm_runtime_suspended_time() will return the suspended accounted time
in ns unit.
Reviewed-by: NUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: NVincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>