add if_ether.h constants ETH_P_802_3_MIN and ETH_P_BATMAN see linux commits 4f99ad51292078cc47343c17d3870764588cff73 and e5c5d22e8dcf7c2d430336cbf8e180bd38e8daf1
adding ethernet protocol ids to if_ether.h following linux
initial check-in, version 0.5.0