NetKVM: BZ#1003442 2c_receivepackets on win2k8 fixed

Unlike HCK WLK tests expect media disconnect indication
on driver power off/unload. Fixing by adding corresponding
indication.
(cherry picked from commit 5f8752a2de494710da1bb7698a318364ff7e7d4f)
NetKVM: BZ#1012200 PM_PowerStateTransition fails on Win8

WLK tests for Windows 2008 require media disconnect indication
on power off. HCK tests for newer versions require media state
unknown indication only and fail on disconnect indication

Fixed by adding conditional compilation.
(cherry picked from commit 0b495db25cefb4e3220dc97ba45c211f4fffd59a)