sys/doc: add net_lorawan group
sys/doc: add net_lorawan group

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