[L] Change in coreboot[main]: soc/intel/xeon_sp: Merge SKX and CPX

[Shuo Liu (Code Review)]

Attention is currently required from: Angel Pons, Arthur Heymans, Christian Walter, Johnny Lin, Jonathan Zhang, Lean Sheng Tan, Morgan Jang, Patrick Rudolph, Tim Chu.

Shuo Liu has posted comments on this change by Patrick Rudolph. ( https://review.coreboot.org/c/coreboot/+/85557?usp=email )

Change subject: soc/intel/xeon_sp: Merge SKX and CPX
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Patch Set 5:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/85557/comment/813b4097_8e4dcfa5?usp... :
PS5, Line 10: - Create a new 14nm folder
> Agree. `chip_gen1. […]

Good point. The only open is that before a ICX port is upstreamed, maybe we need to use chip_gen4.c as the name?