[L] Change in coreboot[main]: mb/google/nissa/var/dirks: Add initial override devicetree

[Ivy Jian (Code Review)]

Attention is currently required from: David Wu, Dinesh Gehlot, Eric Lai, Jayvik Desai, Kapil Porwal, Nick Vaccaro, Subrata Banik.

Hello David Wu, Dinesh Gehlot, Eric Lai, Jayvik Desai, Kapil Porwal, Nick Vaccaro, Subrata Banik,

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

https://review.coreboot.org/c/coreboot/+/85991?usp=email

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

Change subject: mb/google/nissa/var/dirks: Add initial override devicetree
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mb/google/nissa/var/dirks: Add initial override devicetree

Add initial override devicetree for riven based on the
latest schematic (0W4_TWL_A_MB_0113.pdf).

- Add eMMC DLL tuning value (copy from riven)
    - Configure I2C buses
    - Configure USB ports
    - Configure audio codec
    - Configure WIFI6(CNVi) and WIFI7(PCIe)

USB Ports for dirks:
(FRONT) USBA 10G x 3
(REAR)  USBA 10G x 2 + USBC 10G x 1
Note : repurpose the TCSS port 1 to USB3.2 Gen2x1 Type-A (Document Number: 742076)

BUG=b:388117663
TEST=none.

Change-Id: Ib227995cde8d871ff58c89ccb09221226640a7e6
Signed-off-by: Ivy Jian 
---
M src/mainboard/google/brya/variants/dirks/Makefile.mk
M src/mainboard/google/brya/variants/dirks/overridetree.cb
A src/mainboard/google/brya/variants/dirks/ramstage.c
3 files changed, 358 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/91/85991/3