Fix ath6kl-compat wpa private library for KitKat

Resolves problems with wifi (missing MAC address, no resume from
sleep).

* Remove outdated driver_nl80211.h header, and point to the version
  in hardware_legacy includes
* Add WLS_BATCHING to list of ignored commands
* Disable p2p support in driver for STA mode

Change-Id: I3f9a5f7d5228c9eb02885d629dc7356e6df9e725
Merge "Fix ath6kl-compat wpa private library for KitKat" into cm-11.0