If a board in models/ does not exist in coreboot, coreboot will emit a
warning and select the first available board for the vendor instead.
This may result in building and being able to flash coreboot with an
addw1 configuration on another board.
Use minimal set of config selections and let coreboot generate the
default values for the rest of them.
The only differences are the following models selecting
CONFIG_CPU_MICROCODE_CBFS_DEFAULT_BINS instead of *_EXTERNAL_BINS:
- darp5
- darp6
- galp3-c
- galp4
- lemp9