Change in coreboot[master]: soc/intel/denverton_ns: enable Denverton to use common MPINIT code

[Jeff Daly (Code Review)]

Attention is currently required from: Mariusz Szafrański, Suresh Bellampalli, Angel Pons, Patrick Rudolph.
Jeff Daly has removed Michal Motyl from this change.  ( https://review.coreboot.org/c/coreboot/+/61026 )

Change subject: soc/intel/denverton_ns: enable Denverton to use common MPINIT code
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Removed reviewer Michal Motyl.