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

[Michał Kopeć (Code Review)]

Attention is currently required from: Nico Huber, Michał Żygowski, Michał Kopeć.
Michał Kopeć has uploaded a new patch set (#5) to the change originally created by Michał Żygowski. ( https://review.coreboot.org/c/coreboot/+/61682 )

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

This patch addresses post-merge comments from CB:52922. This change
unifies the code used by AMD northbridges, and changes the type of
basek, sizek, limitk to u64.

TEST=Boot PC Engines apu1 and see that RAM resources do not change.

Signed-off-by: Michał Żygowski 
Change-Id: I3d222f6cbd26fe78d968d2883984f25e8b62ab5c
Signed-off-by: Michał Kopeć 
---
M src/northbridge/amd/agesa/family14/Makefile.inc
M src/northbridge/amd/agesa/family14/northbridge.c
M src/northbridge/amd/agesa/family15tn/Makefile.inc
M src/northbridge/amd/agesa/family15tn/northbridge.c
M src/northbridge/amd/agesa/family16kb/Makefile.inc
M src/northbridge/amd/agesa/family16kb/northbridge.c
A src/northbridge/amd/common/ram_calc.c
M src/northbridge/amd/nb_common.h
M src/northbridge/amd/pi/00730F01/Makefile.inc
M src/northbridge/amd/pi/00730F01/northbridge.c
10 files changed, 99 insertions(+), 137 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/82/61682/5