PM QoS: Add CPU frequency min/max as PM QoS params

Add minimum and maximum CPU frequency as PM QoS parameters.

Bug 888312

Reviewed-on: http://git-master/r/72206
Signed-off-by: Antti P Miettinen <amiettinen@nvidia.com>
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-on: http://git-master/r/75883
Reviewed-by: Automatic_Commit_Validation_User

Rebase-Id: R1007bbef60489ecc81a9acd0ce3b0abfa9a05f3e

Change-Id: I18abddded35a044a6ad8365035e31d1a2213a329