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

[Angel Pons (Code Review)]

Attention is currently required from: Arthur Heymans, Nico Huber, Jonathan Zhang, David Hendricks, Edward O'Callaghan, Angel Pons.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/57635 )

Change subject: Add support for Intel Emmitsburg PCH
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Patch Set 1: Code-Review+1

(1 comment)

File ich_descriptors.c:

https://review.coreboot.org/c/flashrom/+/57635/comment/e94bb73d_0274eaa8 
PS1, Line 945: if (content->ISL <= 139)
Can there be Emmitsburg IFDs with less than 80 straps? I'd check for `content->ISL < 80` somewhere, either here or in a `warn_peculiar_desc()` call (which could also check `content->ISL != 80 && content->ISL != 139`)