Move the board rev to the MAC address fuses
NXP has changed the layout of the OTP fuses and the user area is no longer writable so we'll overload the MAC address as a board revision number.
The USB VID and PID are also no longer writable.
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NXP has changed the layout of the OTP fuses and the user area is no longer writable so we'll overload the MAC address as a board revision number.
The USB VID and PID are also no longer writable.