video: tegra: host: Module suspend informs EDP

video: tegra: host: Module suspend informs EDP

GPU scaling informs the current GPU load to EDP each time we change
the GPU frequency. Usually the load vanishes and hence this approach
has proven to work well. However, occassionally the GPU load is high
on the last time we estimate the frequency (before suspending) and this
leads EDP to think that GPU is busy even though it is already turned
off.

This patch adds a path to inform EDP about zero load when we are
suspending the GPU EDP device.

Change-Id: Idfe72ad6afbf2aa01cc30408b7f0890c76a89f62
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-on: http://git-master/r/360431
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>