PM Qos: Add min online cpus as PM QoS parameter

Bug 940061

Change-Id: Ibae842fdc3af3c92ec7e6125c602417110d8b55e
Signed-off-by: Gaurav Sarode <gsarode@nvidia.com>
Reviewed-on: http://git-master/r/84521
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
Tested-by: Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>

Rebase-Id: R830d4e99f1e03b61a8c4e52e11645b7ed2f10f56