[M] Change in coreboot[main]: mb/google/brox: Boot to kernel without battery

[Sowmya Aralguppe (Code Review)]

Attention is currently required from: Caveh Jalali, Dinesh Gehlot, Eric Herrmann, Forest Mittelberg, Kapil Porwal, Karthik Ramasubramanian, Keith Short, Nick Vaccaro, Rishika Raj, Shelley Chen, Subrata Banik.

Hello Caveh Jalali, Dinesh Gehlot, Eric Herrmann, Forest Mittelberg, Kapil Porwal, Karthik Ramasubramanian, Keith Short, Nick Vaccaro, Rishika Raj, Shelley Chen, Subrata Banik,

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

https://review.coreboot.org/c/coreboot/+/83752?usp=email

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

Change subject: mb/google/brox: Boot to kernel without battery
......................................................................

mb/google/brox: Boot to kernel without battery

Set Boot frequency UPD to 1 to avoid higher PL2 power draw when
only adaptor is connected with battery removed or disconnected.
Reduce PL4 value to overcome power spikes from SoC during boot.
Remove Psys implementation since it impacts active state platform
performance.

BUG=b:335046538,b:329722827
BRANCH=None
TEST=Able to successfully boot on 3 different Brox proto2 SKU1
     and SKU2 boards with 65W,45W and 30W adaptors for 3
     iterations of cold boot.

Change-Id: I58e136c607ea9290ecac0cee453d6632760a6433
Signed-off-by: Sowmya Aralguppe 
---
M src/mainboard/google/brox/variants/baseboard/brox/ramstage.c
M src/mainboard/google/brox/variants/brox/ramstage.c
M src/soc/intel/alderlake/romstage/fsp_params.c
3 files changed, 59 insertions(+), 104 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/52/83752/3