[coreboot-gerrit] Change in coreboot[master]: nb/amd/common: Move RAM calcualtion to common code

[Angel Pons (Code Review)]

Attention is currently required from: Nico Huber, Michał Żygowski, Michał Kopeć, Paul Menzel, Arthur Heymans, Krystian Hebel, Kyösti Mälkki.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/61682 )

Change subject: nb/amd/common: Move RAM calcualtion to common code
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Patch Set 6:

(1 comment)

File src/northbridge/amd/agesa/family14/northbridge.c:

https://review.coreboot.org/c/coreboot/+/61682/comment/5bf64273_a3469cb3 
PS6, Line 27: static unsigned int fx_devs = 0;
> There is no perfect order. […]

I tried to clean up fx_devs stuff on f14, CB:64009 and CB:64010 (I'm not sure about the latter change, I'd like to have proper PCI drivers to avoid having to look up other PCI devices).