[XS] Change in coreboot[main]: soc/intel: Select GMA v2 for ADL, MTL, TGL to reflect port/pipe defs

[Eric Lai (Code Review)]

Attention is currently required from: Arthur Heymans, Eran Mitrani, Jakub Czapiga, Julius Werner, Kapil Porwal, Karthik Ramasubramanian, Lean Sheng Tan, Nick Vaccaro, Paul Menzel, Subrata Banik, Tarun, Werner Zeh.

Eric Lai has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78079?usp=email )

Change subject: soc/intel: Select GMA v2 for ADL, MTL, TGL to reflect port/pipe defs
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Patch Set 7: Code-Review+2