[M] Change in coreboot[main]: mb/intel/mtlrvp: Add new MTL-P board variant for PD solution

[Jay Patel (Code Review)]

Jay Patel has abandoned this change. ( https://review.coreboot.org/c/coreboot/+/78282?usp=email )

Change subject: mb/intel/mtlrvp: Add new MTL-P board variant for PD solution
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Abandoned

CL not required