power: Prefer min over max for online cpus

We prefered min_online_cpus over max_online_cpus if min > max.
min_wins is now true for online cpu PmQoS requests.

Bug 1270839

Change-Id: I2888538dd1a4616babb7cd1532264272de5cfe64
Signed-off-by: Sai Gurrappadi <sgurrappadi@nvidia.com>
Reviewed-on: http://git-master/r/301871
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>