Generate Hardware Adress for INGA
Hardware andresses for radios are generated from the CPU serialnumber (cpuid.h). The 1284p has no serial number so this is initialized to some default which is the same for all INGAs. We should find a solution to use the adress generation used in Contiki (use FTDI ID). However, in Contiki this data is saved to EEPROM during node-setup. AFAIK RIOT as no option to confugire nodes persitently via EEPROM.