[S] Change in coreboot[main]: soc/amd/common: use common physical address bit reservation code

[Matt DeVillier (Code Review)]

Attention is currently required from: Felix Held, Fred Reitberger, Jason Glenesk, Jérémy Compostella, Marshall Dawson.

Matt DeVillier has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78074?usp=email )

Change subject: soc/amd/common: use common physical address bit reservation code
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Patch Set 5: Code-Review+2