nrf802154: take FCS into account for lifs/sifs calculation
nrf802154: take FCS into account for lifs/sifs calculation

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