gnrc_netif: remove premature doc group close
gnrc_netif: remove premature doc group close

This adds `GNRC_NETIF_FLAGS_RAWMODE` to the `net_gnrc_netif_flags_t`
group.

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