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

[Usha P (Code Review)]

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

Change subject: soc/intel/alderlake: Adding Kconfig for ADL_N PCH
......................................................................

Patch Set 1:

(1 comment)

File src/soc/intel/alderlake/Kconfig:

https://review.coreboot.org/c/coreboot/+/59751/comment/9d4c7f9c_1e241f72 
PS1, Line 14: 	  Choose this option if you have PCH-N chipset.
> Can’t this be auto-detected at runtime?

This is a config to control the compilation specific to ADL-N. Detecting it in runtime would need to parse through all PCH ID's which won't help us in eliminating the compilation overhead.