atusb/Makefile: removed claim that zones have to be filled in the .brd file
atusb/Makefile: removed claim that zones have to be filled in the .brd file

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan