Change in coreboot[master]: mb/google/brya: Disable C state auto demotion for Brya & Brask

[Maulik V Vaghela (Code Review)]

Attention is currently required from: Subrata Banik, Tim Wawrzynczak.
Hello Felix Singer, build bot (Jenkins), Subrata Banik, Tim Wawrzynczak,

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

https://review.coreboot.org/c/coreboot/+/62630

to look at the new patch set (#5).

Change subject: mb/google/brya: Disable C state auto demotion for Brya & Brask
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mb/google/brya: Disable C state auto demotion for Brya & Brask

C state auto demotion feature allows hardware to determine C state as
per platform policy. Since Brya sets performance policy to balanced from
hardware, auto demotion can be disabled without performance impact.

Also, disabling this feature results in 110 mW power savings during
video playback.

BUG=b:221876248
BRANCH=firmware-brya-14505.B
TEST=Code compiles and correct value of C state auto demotion is passed
to FSP. Also power and performance impact has been measure by respective
teams.

Change-Id: I41eea916cdfe4a86e4d263e3191f5cb40fa33a90
Signed-off-by: MAULIK V VAGHELA 
---
M src/mainboard/google/brya/variants/baseboard/brask/devicetree.cb
M src/mainboard/google/brya/variants/baseboard/brya/devicetree.cb
2 files changed, 6 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/30/62630/5