Change in coreboot[master]: src/mainboard/emulation/qemu-power9: require hb-mode=on

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Paul Menzel, Timothy Pearson, Ron Minnich.
Hello build bot (Jenkins), Arthur Heymans, Timothy Pearson, Ron Minnich,

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

https://review.coreboot.org/c/coreboot/+/57082

to look at the new patch set (#16).

Change subject: src/mainboard/emulation/qemu-power9: require hb-mode=on
......................................................................

src/mainboard/emulation/qemu-power9: require hb-mode=on

"hb-mode" is a -machine flag for QEMU. "hb" stands for Hostboot, which
is OpenPower firmware created by IBM.

QEMU for PPC64 can run initial program in two different modes:
 * hb-mode=off with load address 0x00000000
 * hb-mode=on with load address 0x08000000

Real hardware always loads firmware at 0x08000000 and coreboot shouldn't
require a special build to be run on QEMU.

Memory layout is updated to reflect change of load address.

Change-Id: I1bdc97a095bd46fccc862985b3bd24f4fa5bc054
Signed-off-by: Yaroslav Kurlaev 
Signed-off-by: Sergii Dmytruk 
---
M src/arch/ppc64/rom_media.c
M src/arch/ppc64/stages.c
M src/mainboard/emulation/qemu-power9/memlayout.ld
3 files changed, 33 insertions(+), 11 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/82/57082/16