Change in coreboot[master]: [RFC] soc/intel/{adl,ehl,icl,jsl,tgl}: Invert `eist_enabled`

[Werner Zeh (Code Review)]

Attention is currently required from: Nico Huber, Furquan Shaikh, Tim Wawrzynczak, Angel Pons, Subrata Banik, Patrick Rudolph.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/50426 )

Change subject: [RFC] soc/intel/{adl,ehl,icl,jsl,tgl}: Invert `eist_enabled`
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> I would prefer to simply drop the option. It's not board […]

There is one additional point to consider:
There are valid cases where one would like to disable this feature in order to prevent the CPU frequency changing due to current computing power demand. This can be very nasty in real time environments and for instance siemens mc_xxxx boards would generally disable eist. So having this feature configurable is very handy.