[S] Change in coreboot[master]: intel/common/block/cpu: add cpu clock measure api

[Wonkyu Kim (Code Review)]

Attention is currently required from: Hannah Williams, Jamie Ryu, Kapil Porwal, Subrata Banik.

Wonkyu Kim has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/76123?usp=email )

Change subject: intel/common/block/cpu: add cpu clock measure api
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Patch Set 3:

(1 comment)

File src/soc/intel/common/block/cpu/cpulib.c:

https://review.coreboot.org/c/coreboot/+/76123/comment/8a643497_254acd02 :
PS3, Line 527: 	udelay(100);
> Need to be careful about static delay if we are going to call this function multiple times.

Agreed.   This function will be used early time for checking different silicon SKU.