[S] Change in coreboot[main]: vendorcode/google/chromeos: Use unsigned int for "factory_config"

[Subrata Banik (Code Review)]

Attention is currently required from: Eric Lai, Julius Werner, Kapil Porwal, Shelley Chen, Subrata Banik.

Hello Eric Lai, Julius Werner, Kapil Porwal, Shelley Chen, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/79769?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: vendorcode/google/chromeos: Use unsigned int for "factory_config"
......................................................................

vendorcode/google/chromeos: Use unsigned int for "factory_config"

This patch ensures `chromeos_get_factory_config()` returns an
unsigned integer value because factory config represents
bit-fields to determine the Chromebook Plus branding.

Additionally, introduced safety measures to catch future
"factory_config" bit-field exhaustion.

BUG=b:317880956
TEST=Able to verify that google/screebo is branded as
Chromebook Plus.

Change-Id: I3021b8646de4750b4c8e2a2981f42500894fa2d0
Signed-off-by: Subrata Banik 
---
M src/vendorcode/google/chromeos/chromeos.h
M src/vendorcode/google/chromeos/tpm_factory_config.c
2 files changed, 15 insertions(+), 10 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/69/79769/2