[S] Change in coreboot[main]: {lib, ec/google}: Add weak implementation for get_lid_switch()

[Subrata Banik (Code Review)]

Attention is currently required from: Boris Mittelberg, Caveh Jalali, Jakub Czapiga, Julius Werner, Nick Vaccaro, Nick Vaccaro, Yu-Ping Wu.

Hello Boris Mittelberg, Caveh Jalali, Jakub Czapiga, Julius Werner, Nick Vaccaro, Nick Vaccaro, Yu-Ping Wu, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/78076?usp=email

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

The following approvals got outdated and were removed:
Code-Review+1 by Jakub Czapiga, Verified+1 by build bot (Jenkins)

Change subject: {lib, ec/google}: Add weak implementation for get_lid_switch()
......................................................................

{lib, ec/google}: Add weak implementation for get_lid_switch()

This patch implements a weak get_lid_switch() function that returns 1
(aka LID open) unless overridden by a real implementation.

This is necessary for platforms that do not have the
EC_GOOGLE_CHROMEEC_LPC config.

Additionally, this function is now getting called twice in ramstage
(once for lb_gpios and once by the GMA driver), so cached the response
from `get_lid_switch()` in a static local variable to avoid unnecessary
overhead.

BUG=b:299137940
TEST=Able to build and boot google/rex.

Change-Id: I8847bc6f08f5d9cecf9d9ddaf33c44bd40491e98
Signed-off-by: Subrata Banik 
---
M src/ec/google/chromeec/switches.c
M src/lib/bootmode.c
2 files changed, 14 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/76/78076/3