[M] Change in coreboot[master]: mb/google/myst: Add new mainboard

[Jon Murphy (Code Review)]

Attention is currently required from: Raul Rangel, Jon Murphy, Martin Roth, Tim Van Patten, Mark Hasemeyer.

Hello build bot (Jenkins), Raul Rangel, Martin Roth, Tim Van Patten, Karthik Ramasubramanian, Mark Hasemeyer,

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

https://review.coreboot.org/c/coreboot/+/74093

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

Change subject: mb/google/myst: Add new mainboard
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mb/google/myst: Add new mainboard

Myst is a new Google mainboard with an AMD Phoenix SOC.

BUG=b:270596106
TEST=util/abuild/abuild -t GOOGLE_MYST --clean

Signed-off-by: Jon Murphy 
Change-Id: Id7d731ce4d6cb6d4e9041f46eb5a799865bb0b9a
---
A src/mainboard/google/myst/Kconfig
A src/mainboard/google/myst/Kconfig.name
A src/mainboard/google/myst/Makefile.inc
A src/mainboard/google/myst/board_info.txt
A src/mainboard/google/myst/bootblock.c
A src/mainboard/google/myst/chromeos.fmd
A src/mainboard/google/myst/dsdt.asl
A src/mainboard/google/myst/mainboard.c
A src/mainboard/google/myst/port_descriptors.c
A src/mainboard/google/myst/variants/baseboard/devicetree.cb
A src/mainboard/google/myst/variants/baseboard/include/baseboard/variants.h
11 files changed, 187 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/93/74093/3