eui48: Add address flag helper functions
eui48: Add address flag helper functions

mtausig/RIOT,smlng/RIOT,ant9000/RIOT,toonst/RIOT,RIOT-OS/RIOT,x3ro/RIOT,x3ro/RIOT,kaspar030/RIOT,kaspar030/RIOT,aeneby/RIOT,josephnoir/RIOT,rfuentess/RIOT,kaspar030/RIOT,kaspar030/RIOT,miri64/RIOT,josephnoir/RIOT,ant9000/RIOT,miri64/RIOT,miri64/RIOT,yogo1212/RIOT,OlegHahm/RIOT,mtausig/RIOT,basilfx/RIOT,aeneby/RIOT,RIOT-OS/RIOT,cladmi/RIOT,yogo1212/RIOT,josephnoir/RIOT,basilfx/RIOT,miri64/RIOT,authmillenon/RIOT,yogo1212/RIOT,jasonatran/RIOT,jasonatran/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,cladmi/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,yogo1212/RIOT,mtausig/RIOT,smlng/RIOT,authmillenon/RIOT,kYc0o/RIOT,miri64/RIOT,smlng/RIOT,OlegHahm/RIOT,josephnoir/RIOT,rfuentess/RIOT,aeneby/RIOT,aeneby/RIOT,RIOT-OS/RIOT,aeneby/RIOT,basilfx/RIOT,kaspar030/RIOT,kYc0o/RIOT,toonst/RIOT,authmillenon/RIOT,basilfx/RIOT,ant9000/RIOT,toonst/RIOT,OTAkeys/RIOT,rfuentess/RIOT,smlng/RIOT,x3ro/RIOT,authmillenon/RIOT,x3ro/RIOT,OTAkeys/RIOT,kYc0o/RIOT,cladmi/RIOT,jasonatran/RIOT,authmillenon/RIOT,toonst/RIOT,ant9000/RIOT,OTAkeys/RIOT,kYc0o/RIOT,x3ro/RIOT,jasonatran/RIOT,mtausig/RIOT,smlng/RIOT,toonst/RIOT,kYc0o/RIOT,basilfx/RIOT,cladmi/RIOT,RIOT-OS/RIOT,rfuentess/RIOT,ant9000/RIOT,cladmi/RIOT,RIOT-OS/RIOT,josephnoir/RIOT,yogo1212/RIOT,OlegHahm/RIOT,jasonatran/RIOT,yogo1212/RIOT,authmillenon/RIOT,rfuentess/RIOT,mtausig/RIOT