[S] Change in coreboot[main]: arch/x86: Add API to check if cache sets are power-of-two

[Stefan Reinauer (Code Review)]

Attention is currently required from: Jérémy Compostella, Subrata Banik.

Stefan Reinauer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81268?usp=email )

Change subject: arch/x86: Add API to check if cache sets are power-of-two
......................................................................

Patch Set 1: Code-Review+2