[S] Change in coreboot[master]: mb/intel/mtlrvp: align directory structure to chrome project

[Harsha B R (Code Review)]

Attention is currently required from: Rizwan Qureshi, Sridhar Siricilla, Krishna P Bhat D, Ronak Kanabar, Usha P.

Harsha B R has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69971 )

Change subject: mb/intel/mtlrvp: align directory structure to chrome project
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Patch Set 2:

This change is ready for review.