pd#81483 fix p2p can't scan bug after resume

pd#81483 fix p2p can't scan bug after resume

Squashed commit of the following:

commit 13eed7f93350970cd0c00deda70023a7808f8c4e
Author: peter.lin <peter.lin@amlogic.com>
Date:   Fri Nov 29 17:13:03 2013 +0800

    PD #81483: set DISCOVERY_ON after p2p really ok

commit 26c447753ea507c657b381463c8bad4022b0e7b6
Author: peter.lin <peter.lin@amlogic.com>
Date:   Wed Nov 27 18:47:18 2013 +0800

    PD #81483: embed HANG into unprot deauth msg

commit 8172915293be2ae2d4aa3ce4047a82120b6717a2
Author: peter.lin <peter.lin@amlogic.com>
Date:   Wed Nov 27 18:42:29 2013 +0800

    PD #81483: filter out cmd before p2p interface is ready