[S] Change in coreboot[master]: ec/google/chromeec/ec_commands.h: Use C99 flexible arrays

[Caveh Jalali (Code Review)]

Attention is currently required from: Boris Mittelberg, Elyes Haouas, Jakub Czapiga.

Caveh Jalali has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/76838?usp=email )

Change subject: ec/google/chromeec/ec_commands.h: Use C99 flexible arrays
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Patch Set 1:

(1 comment)

File src/ec/google/chromeec/ec_commands.h:

PS1:
> This file is a copy of [ChromeEC ec_commands.h](https://chromium.googlesource. […]

+1 this file need to be kept in sync with its parent copy for correctness.
you can update it with a script we recently provided in https://review.coreboot.org/c/coreboot/+/74879.

however, we really need to make sure these changes are appropriate in the
EC repo first. please see `FLEXIBLE_ARRAY_MEMBER_SIZE` at the beginning
of this file.