netopt: deprecate getting NETOPT_IPV6_IID from netdev
netopt: deprecate getting NETOPT_IPV6_IID from netdev

toonst/RIOT,OlegHahm/RIOT,authmillenon/RIOT,josephnoir/RIOT,x3ro/RIOT,OlegHahm/RIOT,BytesGalore/RIOT,authmillenon/RIOT,kYc0o/RIOT,BytesGalore/RIOT,lazytech-org/RIOT,cladmi/RIOT,OlegHahm/RIOT,mtausig/RIOT,OTAkeys/RIOT,lazytech-org/RIOT,aeneby/RIOT,mfrey/RIOT,mfrey/RIOT,yogo1212/RIOT,josephnoir/RIOT,ant9000/RIOT,x3ro/RIOT,toonst/RIOT,rfuentess/RIOT,OTAkeys/RIOT,cladmi/RIOT,ant9000/RIOT,yogo1212/RIOT,jasonatran/RIOT,rfuentess/RIOT,rfuentess/RIOT,smlng/RIOT,mfrey/RIOT,jasonatran/RIOT,miri64/RIOT,RIOT-OS/RIOT,basilfx/RIOT,yogo1212/RIOT,mfrey/RIOT,smlng/RIOT,yogo1212/RIOT,rfuentess/RIOT,kYc0o/RIOT,aeneby/RIOT,rfuentess/RIOT,jasonatran/RIOT,mtausig/RIOT,ant9000/RIOT,lazytech-org/RIOT,miri64/RIOT,josephnoir/RIOT,basilfx/RIOT,mtausig/RIOT,BytesGalore/RIOT,yogo1212/RIOT,jasonatran/RIOT,miri64/RIOT,ant9000/RIOT,A-Paul/RIOT,authmillenon/RIOT,toonst/RIOT,basilfx/RIOT,lazytech-org/RIOT,kaspar030/RIOT,cladmi/RIOT,toonst/RIOT,aeneby/RIOT,authmillenon/RIOT,OTAkeys/RIOT,mtausig/RIOT,authmillenon/RIOT,aeneby/RIOT,lazytech-org/RIOT,BytesGalore/RIOT,OlegHahm/RIOT,jasonatran/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,kaspar030/RIOT,basilfx/RIOT,smlng/RIOT,kaspar030/RIOT,josephnoir/RIOT,yogo1212/RIOT,A-Paul/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,A-Paul/RIOT,RIOT-OS/RIOT,aeneby/RIOT,kaspar030/RIOT,OTAkeys/RIOT,RIOT-OS/RIOT,basilfx/RIOT,A-Paul/RIOT,OlegHahm/RIOT,miri64/RIOT,cladmi/RIOT,ant9000/RIOT,A-Paul/RIOT,toonst/RIOT,kYc0o/RIOT,kaspar030/RIOT,josephnoir/RIOT,smlng/RIOT,BytesGalore/RIOT,kYc0o/RIOT,miri64/RIOT,smlng/RIOT,x3ro/RIOT,cladmi/RIOT,x3ro/RIOT,x3ro/RIOT,mtausig/RIOT,authmillenon/RIOT,mfrey/RIOT