[XS] Change in coreboot[main]: soc/intel/mtl: Override the `SOC_PHYSICAL_ADDRESS_WIDTH` as integer

[Jakub Czapiga (Code Review)]

Attention is currently required from: Dinesh Gehlot, Eran Mitrani, Kapil Porwal, Mike Banon, Subrata Banik, Tarun.

Jakub Czapiga has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79842?usp=email )

Change subject: soc/intel/mtl: Override the `SOC_PHYSICAL_ADDRESS_WIDTH` as integer
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Patch Set 2: Code-Review+2