msm: mdss: add early wake up for dfps update

During early wake up notification, add the request
to update the fps to the default value, so we can
avoid this latency during the first frame update
after Idle.

Change-Id: I796a6ecba19f451e0f5e202c29e4de0d62a8cd5a
Signed-off-by: Ingrid Gallardo <ingridg@codeaurora.org>