Change in coreboot[master]: mb/google/guybrush/var/nipperkin: Board values for eDP tuning

[Bao Zheng (Code Review)]

Attention is currently required from: Bao Zheng, Zheng Bao.
Hello build bot (Jenkins), Zheng Bao,

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

https://review.coreboot.org/c/coreboot/+/59919

to look at the new patch set (#6).

Change subject: mb/google/guybrush/var/nipperkin: Board values for eDP tuning
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mb/google/guybrush/var/nipperkin: Board values for eDP tuning

Reference test document, update tuning registers from pass experiment
setting of phy_settings.
The document about eDP tuning can be got from the issue tracker of
this ticket, at the link
https://partnerissuetracker.corp.google.com/issues/203061533#comment6

BUG=b:203061533

Change-Id: I7aa8c594d9f5caa6b2523dac079aef89e623c56f
Signed-off-by: Zheng Bao 
---
M src/mainboard/google/guybrush/variants/nipperkin/overridetree.cb
1 file changed, 13 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/59919/6