drivers/mii: Media-Independent Interface utils
drivers/mii: Media-Independent Interface utils

Add utilities for working with Ethernet Media-Independent Interface for use by
Ethernet drivers.

ant9000/RIOT,RIOT-OS/RIOT,jasonatran/RIOT,OTAkeys/RIOT,kaspar030/RIOT,miri64/RIOT,ant9000/RIOT,jasonatran/RIOT,authmillenon/RIOT,OlegHahm/RIOT,ant9000/RIOT,kYc0o/RIOT,authmillenon/RIOT,OTAkeys/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,authmillenon/RIOT,kYc0o/RIOT,OTAkeys/RIOT,jasonatran/RIOT,miri64/RIOT,OTAkeys/RIOT,authmillenon/RIOT,OTAkeys/RIOT,authmillenon/RIOT,ant9000/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,RIOT-OS/RIOT,ant9000/RIOT,OlegHahm/RIOT,kYc0o/RIOT,kaspar030/RIOT,kYc0o/RIOT,OlegHahm/RIOT,jasonatran/RIOT,miri64/RIOT,kaspar030/RIOT,kYc0o/RIOT,OlegHahm/RIOT,miri64/RIOT,miri64/RIOT,kaspar030/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT