Revert "cfg80211: Changes to support key managment offload"

This reverts commit 269e7d4a.

Key management offload (LFR3) cannot be dependent on kernel changes
that have not yet been up-streamed.  Therefore, all kernel support
for key management offload needs to be reverted until the open source
version of kernel support for key management offload is available.

Conflicts:
	include/net/cfg80211.h

CRs-Fixed: 778119
Change-Id: I4ea487d312504be3cc180e814a7807a89344bef1
Signed-off-by: Chet Lanctot <clanctot@codeaurora.org>