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

[Angel Pons (Code Review)]

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

Angel Pons 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: Code-Review+1

(4 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/85557/comment/c4393098_cfee49da?usp... :
PS5, Line 10: - Create a new 14nm folder
> There are '(xx)nm - old' and 'intel(x) - new' for process namings which is confusing. […]

Is there an Intel name for the "Xeon-SP SPR and CPX" group?

File src/soc/intel/xeon_sp/14nm/Kconfig:

https://review.coreboot.org/c/coreboot/+/85557/comment/601db22f_ab6500bc?usp... :
PS5, Line 9: 	  Intel 14nm SoC (CPUID 506fx and CPUID 5065x)
```suggestion
      Intel Xeon-SP 14nm SoC (CPUID 506fx and CPUID 5065x)
```

File src/soc/intel/xeon_sp/14nm/cpu.c:

https://review.coreboot.org/c/coreboot/+/85557/comment/946d8768_a99564bd?usp... :
PS5, Line 86: 	assert(chip_config);
Not sure if losing this is important

File src/soc/intel/xeon_sp/cpx/Kconfig:

https://review.coreboot.org/c/coreboot/+/85557/comment/ce43f2e7_24c2ee69?usp... :
PS5, Line 5: 	select SOC_INTEL_XEON_SP_14NM
> Maybe we can have a SOC_INTEL_XEON_SP_GEN3 but select the same kconfigs as SOC_INTEL_XEON_SP_GEN1

I don't know what GEN1 and GEN3 correspond to, SKX and CPX respectively?