2019-08-06 update,BPI-M4/BPI-W2 Debian 10 Buster Lite Demo Image, doing a simple ifconfig two wifi adapters found with TWO Mac Addresses!
wlan1 and wlxa09f10XXXXXX
[ 308.019400] RTW: wlan1- hw port(1) mac_addr =xx:xx:xx:xx:xx:xx [ 375.073273] RTW: rtw_hal_set_macaddr_port wlxaXXXXXXXXXX- hw port(0)
Same if connecting and external wifi USB dongle