Register GPU as a devfreq cooling device so that it can be passively
cooled by the thermal framework.
Signed-off-by: NAkhil P Oommen <akhilpo@codeaurora.org>
Tested-by: NMatthias Kaehlcke <mka@chromium.org>
Signed-off-by: NRob Clark <robdclark@chromium.org>