AOSP: nl80211 use_multi_chan_concurrent=1 parameter

AOSP: nl80211 use_multi_chan_concurrent=1 parameter

This came as part of this AOSP commit:

commit 1f69aa52ea2e0a73ac502565df8c666ee49cab6a
Author: Dmitry Shmidt <dimitrysh@google.com>
Date:   Tue Jan 24 16:10:04 2012 -0800

    Update to new version 0.8.16 from BRCM

    Sync with main tree commit b8349523e460493fa0b4de36c689595109e45e91
    Author: Neeraj Kumar Garg <neerajkg@broadcom.com>
    Date:   Tue Dec 27 23:21:45 2011 +0200
        P2P: Reject p2p_group_add if forced frequency is not acceptable

    Change-Id: Icb4541a371b05c270e80440d7a7fdea7f33ff61e
    Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>