Change in coreboot[master]: soc/intel/alderlake: Add Kconfig for ADL_N PCH

[Angel Pons (Code Review)]

Attention is currently required from: Reka Norman, Maulik V Vaghela, Paul Menzel, Rizwan Qureshi, Subrata Banik, Sridhar Siricilla, Krishna P Bhat D, Usha P, Patrick Rudolph, Kangheui Won.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59751 )

Change subject: soc/intel/alderlake: Add Kconfig for ADL_N PCH
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Patch Set 2:

(1 comment)

File src/soc/intel/alderlake/Kconfig:

https://review.coreboot.org/c/coreboot/+/59751/comment/1276d210_e7ec5c9b 
PS1, Line 14: 	  Choose this option if you have PCH-N chipset.
> This is a config to control the compilation specific to ADL-N. […]

It would introduce lots of unnecessary complexity. Mainboards only use one type of PCH and it's always the same, so this is a compile-time constant. Yes, someone could choose the wrong PCH type when adding a new mainboard, but that would be their problem.