Change in coreboot[master]: arch/x86/postcar: Set up postcar in C code

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans, Aaron Durbin.
Hello build bot (Jenkins), Aaron Durbin,

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

https://review.coreboot.org/c/coreboot/+/54299

to look at the new patch set (#5).

Change subject: arch/x86/postcar: Set up postcar in C code
......................................................................

arch/x86/postcar: Set up postcar in C code

TESTED on Qemu.

Change-Id: I5ec10e84118197a04de0a5194336ef8bb049bba4
Signed-off-by: Arthur Heymans 
---
M src/arch/x86/exit_car.S
M src/arch/x86/include/arch/romstage.h
M src/arch/x86/postcar.c
M src/arch/x86/postcar_loader.c
M src/cpu/x86/mtrr/Makefile.inc
M src/cpu/x86/mtrr/earlymtrr.c
M src/include/cpu/x86/mtrr.h
7 files changed, 60 insertions(+), 219 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/99/54299/5