Change in coreboot[master]: amdfwtool: Use relative address for EFS gen2

[Bao Zheng (Code Review)]

Attention is currently required from: Martin Roth, Marshall Dawson, Kangheui Won, Paul Menzel, Zheng Bao, Eric Peers, Karthikeyan Ramasubramanian.
Hello build bot (Jenkins), Martin Roth, Marshall Dawson, Kangheui Won, Zheng Bao, Karthikeyan Ramasubramanian, Felix Held,

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

https://review.coreboot.org/c/coreboot/+/56438

to look at the new patch set (#15).

Change subject: amdfwtool: Use relative address for EFS gen2
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amdfwtool: Use relative address for EFS gen2

The second generation EFS (offset 0x24[0]=0) uses
"binary relative" offsets and not "x86 physical
MMIO address" like gen1.

Chips like Cezanne can run in both cases, so no problem
comes up so far.

The related change in psp_verstage has been uploaded.
https://review.coreboot.org/c/coreboot/+/58316

BUG=b:188754219
Test=Majolica (Cezanne)

Change-Id: I7701c7819f03586d4ecab3d744056c8c902b630f
Signed-off-by: Zheng Bao 
---
M util/amdfwtool/amdfwtool.c
M util/amdfwtool/amdfwtool.h
2 files changed, 22 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/56438/15