Change in coreboot[master]: cpu/intel/*: Set SMM SMRR code access check bit

[Arthur Heymans (Code Review)]

Attention is currently required from: Jeff Daly, Subrata Banik, Mariusz Szafrański, Suresh Bellampalli, Paul Menzel, Tim Wawrzynczak, Vanessa Eusebio.
Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63788 )

Change subject: cpu/intel/*: Set SMM SMRR code access check bit
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Patch Set 4:

(1 comment)

Patchset:

PS4: 
Interesting. Xeon-SP has PCI addresses for that instead of MSR. Maybe it's to support multiple packages at once? Need to investigate.