Change in flashrom[master]: Revert "Add support for Intel Emmitsburg PCH"

[David Hendricks (Code Review)]

Attention is currently required from: Arthur Heymans, Nico Huber, Jonathan Zhang, Johnny Lin, Christian Walter, David Hendricks, Deomid "rojer" Ryabkov, Tim Chu.
David Hendricks has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/57589 )

Change subject: Revert "Add support for Intel Emmitsburg PCH"
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Patch Set 3: Code-Review-1

(1 comment)

Patchset:

PS3: 
Note: Reverting CB:55651 will also fix the problem we have here without needing CB:57633 and CB:57635 to add EBG back in.

So we have three paths here:
1. Merge this followed by CB:57633 and CB:57635
2. Merge CB:57581 alone which uses `==` to check for EBG/LBG and avoids the need for reverts.
3. Revert CB:55651, which avoids the need for any further changes.

I'm putting -1 here since I think #3 is the most straightforward approach, but I'm happy to defer to the active maintainers on how to proceed.