Change in coreboot[master]: mb/google/brya/brya0: Manually probe fw_config for DB_LTE

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Tim Wawrzynczak, EricR Lai.
Hello build bot (Jenkins), EricR Lai,

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

https://review.coreboot.org/c/coreboot/+/54633

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

Change subject: mb/google/brya/brya0: Manually probe fw_config for DB_LTE
......................................................................

mb/google/brya/brya0: Manually probe fw_config for DB_LTE

In order to use the USB WWAN module in USB mode (as opposed to PCIe),
the PCIe RP must be turned off at the FSP level. The `probe` statement
in the devicetree unfortunately takes effect too late, because the UPDs
for disabling/enabling PCIE RP belong to FSP-M (romstage), whereas
fw_config probing for devicetree is done in ramstage.

Add a new variant-specific file which will handle manually setting the
UPD based on FW_CONFIG instead.

BUG=b:180166408
TEST=set CBI FW_CONFIG field to LTE_USB, see message in console,
set field to LTE_PCIE, do not see message in console.

Change-Id: Ica2f64ec99fa547e233012dc201577a14f6aa7d7
Signed-off-by: Tim Wawrzynczak 
---
M src/mainboard/google/brya/romstage.c
M src/mainboard/google/brya/variants/baseboard/include/baseboard/variants.h
A src/mainboard/google/brya/variants/brya0/Makefile.inc
M src/mainboard/google/brya/variants/brya0/overridetree.cb
A src/mainboard/google/brya/variants/brya0/variant.c
5 files changed, 22 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/54633/2