UPSTREAM: PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is...

UPSTREAM: PM / devfreq: Send the DEVFREQ_POSTCHANGE notification when target() is failed

This patch sends the DEVFREQ_POSTCHANGE notification when
devfreq->profile->targer() is failed. The PRECHANGE/POSTCHANGE
should be paired.

Fixes: 0fe3a66410a3 (PM / devfreq: Add new DEVFREQ_TRANSITION_NOTIFIER notifier)
Change-Id: I571fcc0ba95da6f7533d20818dfbd5f628c2f3ee
Reported-by: Lin Huang <hl@rock-chips.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
(cherry picked from commit 0d37189e80163c653771916afe28fae1a8d14daa)