Revert "nl80211: fixes for event reordering."

This reverts commit 826d3568.

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.

CRs-Fixed: 778119
Change-Id: Id5b7c93cb9a82f43f0a7195f8eba15e83a6cdcec
Signed-off-by: Chet Lanctot <clanctot@codeaurora.org>