input-cfboost: improve boost latency

Place a request for one online CPU core to eliminate a 70ms delay before
transition to the G-core on Tegra3.

Change-Id: Ie81f37c0b85a574d9f1432c67818bdd4c3436c9b
Signed-off-by: Michal Pecio <mpecio@nvidia.com>
Reviewed-on: http://git-master/r/122188
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>