Possible solution: https://fedoramagazine.org/randomize-mac-address-nm/

Adding here: https://github.com/armbian/build/blob/master/lib/distributions.sh

Solution needs to be tested on versions that came with Xenial/Stretch builds too.

https://forum.armbian.com/topic/12198-switching-sunxi-dev-to-54y/?do=findComment&comment=90319