[M] Change in coreboot[main]: vc/google/chromeos: Implement platform callback for critical shutdown

[Subrata Banik (Code Review)]

Attention is currently required from: Julius Werner, Karthik Ramasubramanian.

Hello Julius Werner, Karthik Ramasubramanian, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/86228?usp=email

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

Change subject: vc/google/chromeos: Implement platform callback for critical shutdown
......................................................................

vc/google/chromeos: Implement platform callback for critical shutdown

This commit implements `platform_is_low_battery_shutdown_needed` and
`platform_issue_low_battery_shutdown` callbacks for ChromeOS.

- platform_is_low_battery_shutdown_needed: API to check if low battery
   shutdown is needed.

- platform_issue_low_battery_shutdown: API to issue a shutdown due to
   low battery.

BUG=b:339673254
TEST=Verified low battery boot event logging and controlled shutdown.

Change-Id: I119f80a45c045a6095cae98f179c755a2e948e9c
Signed-off-by: Subrata Banik 
---
M src/vendorcode/google/chromeos/Makefile.mk
A src/vendorcode/google/chromeos/battery.c
2 files changed, 63 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/86228/6