wcnss: Add support to configure the Wlan MAC addr

    This change introduces a sysfs entry to allow userspace to
    configure the wlan MAC addr and exports an API which allows
    WLAN and other wireless technologies to query the wlan MAC
    addr

    Change-Id: I751b2cf2db1321926e8e16ef1baaa4fa3d8d06cf
    CRs-Fixed: 583465
    Signed-off-by:  <hkpatel@codeaurora.org>

Change-Id: I99e811de26abca74ddac9cc1b75c8eba02b8fa36