[coreboot-gerrit] Change in coreboot[master]: soc/intel/{cannonlake,icelake}: Drop unhooked `SendVrMbxCmd`

[Michael Niewöhner (Code Review)]

Attention is currently required from:  Felix Singer, Jeremy Soller, Angel Pons, Patrick Rudolph.
Michael Niewöhner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52102 )

Change subject: soc/intel/{cannonlake,icelake}: Drop unhooked `SendVrMbxCmd`
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Patch Set 1: Code-Review+1