[M] Change in coreboot[master]: soc/intel/cmn/tom: Cache TOM region early

[Subrata Banik (Code Review)]

Attention is currently required from: Tarun Tuli, Jamie Ryu, Paul Menzel, Kapil Porwal, Arthur Heymans.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/73272 )

Change subject: soc/intel/cmn/tom: Cache TOM region early
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Patch Set 4:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/73272/comment/f6de8f0c_d9005edc 
PS1, Line 12:
> Maybe start with something like:
> > Due to MTRR programming the 16 MB TOM region is uncached, causing long access times.

done