Revert "cfg80211: Pass PTK as part of key management offload completion"

This reverts commit c0332168.

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: I5b3175c65d59a95e632200411b29fbd52cb87d94
Signed-off-by: Chet Lanctot <clanctot@codeaurora.org>