Change in coreboot[master]: amd/pi/00670F00: Add memmap file

[Marshall Dawson (Code Review)]

Hello Kyösti Mälkki, build bot (Jenkins),

I'd like you to reexamine a change.  Please visit

https://review.coreboot.org/18428

to look at the new patch set (#19).

Change subject: amd/pi/00670F00: Add memmap file
......................................................................

amd/pi/00670F00: Add memmap file

In preparation for supporting EARLY_CBMEM_INIT, move the UMA
base and size calculation code into a new memmap.c file.

Original-Signed-off-by: Marshall Dawson 
Original-Reviewed-by: Marc Jones 
(cherry picked from commit 4fec9f6754675bbe0c8fbfc031c5c5665dace34b)

Change-Id: I8ddaa8359536081752fb8e47e49f4d5958416620
Signed-off-by: Marc Jones 
---
M src/northbridge/amd/pi/00670F00/Makefile.inc
A src/northbridge/amd/pi/00670F00/memmap.c
A src/northbridge/amd/pi/00670F00/memmap.h
M src/northbridge/amd/pi/00670F00/northbridge.c
4 files changed, 102 insertions(+), 38 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/18428/19