[M] Change in coreboot[master]: util/cbfstool: Add a new mechanism to provide a memory mapped

[Maximilian Brune (Code Review)]

Attention is currently required from: Nico Huber, Julius Werner, Arthur Heymans.

Maximilian Brune has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68160 )

Change subject: util/cbfstool: Add a new mechanism to provide a memory mapped
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Patch Set 4:

(1 comment)

File src/soc/intel/common/block/fast_spi/Makefile.inc:

https://review.coreboot.org/c/coreboot/+/68160/comment/0cb4959e_21379cac 
PS4, Line 91: FLASH_BIOS_BASE
> nit: I find the naming here a bit confusing, it took me too long to figure out that "BIOS" and "EXT_ […]

If anything I would use your first suggestion. Using obscure naming schemes like 'DEFAULT' only makes an 'use either default or extended values' impression to me.
Although considering the code comment above, I think it's more or less clear what the values mean.