video: tegra: host: podgov: Scaling turns on dev

video: tegra: host: podgov: Scaling turns on dev

podgov exposes different scaling schemes. Only the most common
scheme, scaling based on busy/idle events, had proper module_busy
and module_idle guaranteed. Userspace and framerate based policies
did not explicitly enable device and this may have lead to usage of
hardware when it is not powered.

Change-Id: If882765d3d07e4d64d16942e247c9863f7597840
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/323996
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Mitch Luban <mluban@nvidia.com>