Change in coreboot[master]: soc/intel/alderlake: Add support for ADL-N PCH

[Usha P (Code Review)]

Attention is currently required from: Reka Norman, Maulik V Vaghela, Paul Menzel, Rizwan Qureshi, Subrata Banik, Angel Pons, Krishna P Bhat D, Patrick Rudolph, Kangheui Won.
Usha P has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59752 )

Change subject: soc/intel/alderlake: Add support for ADL-N PCH
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Patch Set 4:

(2 comments)

File src/soc/intel/alderlake/Kconfig:

https://review.coreboot.org/c/coreboot/+/59752/comment/c00e44ad_2c0bd943 
PS2, Line 193: 	default 5 if SOC_INTEL_ALDERLAKE_PCH_N
> also check this […]

Document 645548 chapter 13 indicates ADL-N supports 5 clock sources and 5 clock request signals.

https://review.coreboot.org/c/coreboot/+/59752/comment/d590a1bb_3f277da1 
PS2, Line 199: 	default 5 if SOC_INTEL_ALDERLAKE_PCH_N
> same as above

Document 645548 chapter 13 indicates ADL-N supports 5 clock sources and 5 clock request signals.