When driver uses random mac address to scan, the unicast probe response
will not be received because the addr1 is not matched. Configure port
address by requested mac address to receive probe response from AP.

To support random mac scan, we need to configure the mac address during
scan period to receive unicast prop_resp. After scan is completed,
configure the mac address back to the original one that the port used.
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>