Change in coreboot[master]: src/arch/ppc64/*: pass FDT address to payload

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Sergii Dmytruk, Ron Minnich.
Hello build bot (Jenkins), Ron Minnich,

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

https://review.coreboot.org/c/coreboot/+/57084

to look at the new patch set (#3).

Change subject: src/arch/ppc64/*: pass FDT address to payload
......................................................................

src/arch/ppc64/*: pass FDT address to payload

It's available in %r3 in bootblock and needs to be passed first to
romstage, then to ramstage, where it's put into CMBEM to be read on
starting payload.

Change-Id: I0911f4b534c6f8cacfa057a5bad7576fec711637
Signed-off-by: Sergii Dmytruk 
---
M src/arch/ppc64/boot.c
M src/arch/ppc64/bootblock_crt0.S
A src/arch/ppc64/fdt.h
M src/arch/ppc64/stages.c
4 files changed, 85 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/84/57084/3