[D18][BOARD] apply MAC address from eeprom
[D18][BOARD] Implement EEPROM MAC address setup
picked from 968b81acce39a561b280205db98bfff0e81cb602
[D18][BOARD] MAC Adress: allow old HAM prefix, rework checking code
- Add a list of allowed prefixes for the MAC adress
- Also allow the old HAM prefix
- Move the prefix check code to function
- Add function to check ignore 0x000000 MAC address
- Rework programm flow, so error in MAC address #1 does not influence
MAC adress #2