[S] Change in coreboot[main]: drivers/smmstore: add ability to write to whole flash

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Arthur Heymans, Felix Held, Martin L Roth, Patrick Rudolph, Paul Menzel.

Sergii Dmytruk has posted comments on this change by Sergii Dmytruk. ( https://review.coreboot.org/c/coreboot/+/83424?usp=email )

Change subject: drivers/smmstore: add ability to write to whole flash
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Patch Set 6:

(1 comment)

File src/include/smmstore.h:

https://review.coreboot.org/c/coreboot/+/83424/comment/9ae3881a_c9a4d3b9?usp... :
PS6, Line 25: SMMSTORE_CMD_USE_FULL_FLASH
> Is that an official name? Should it be `…ALLOW_ACCESS_TO_FULL_FLASH` or so?

Official in a sense that it comes from Mr.Chromebox' EDK?  No, it doesn't have these changes.

Because this is both a command and a modifier, there will be a tradeoff when choosing a name.  Mind that applying the modifier changes the base for flashing, so it's not just lifting size limit but changing interpretation of offset as well.  Not sure if `ALLOW_ACCESS` captures that better.