[M] Change in coreboot[main]: superio/ite: Add special fan vectors and further options

[Nico Huber (Code Review)]

Attention is currently required from: Joel Linn, Matt DeVillier.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81426?usp=email )

Change subject: superio/ite: Add special fan vectors and further options
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Patch Set 4:

(1 comment)

File src/superio/ite/common/env_ctrl.c:

https://review.coreboot.org/c/coreboot/+/81426/comment/999e33f0_35966f45 :
PS1, Line 369: #endif
> just set the vector count to 2 regardless of the Kconfig enablement, unless it causes an issue elsew […]

I guess the original intention was to keep the configuration struct clean
for chips that don't have this feature. Though, I agree wasting some space
there might be better than overengineering it.

I would decide between these two options:
* have a separate C file for the fan vector code (if that doesn't bring other downsides I'm missing), or
* always have the struct entries.