[XS] Change in coreboot[master]: mb/google/rex/var/screebo: Set `SAGV_POINTS_0_1_2` to avoid hang

[Wentao Qin (Code Review)]

Attention is currently required from: Eran Mitrani, Jakub Czapiga, Kane Chen, Kapil Porwal, Tarun, Wentao Qin.

Hello Eran Mitrani, Jakub Czapiga, Kane Chen, Kapil Porwal, Kun Liu, Subrata Banik, Tarun, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/77520?usp=email

to look at the new patch set (#5).

Change subject: mb/google/rex/var/screebo: Set `SAGV_POINTS_0_1_2` to avoid hang
......................................................................

mb/google/rex/var/screebo: Set `SAGV_POINTS_0_1_2` to avoid hang

Setting SaGvWpMask to SAGV_POINTS_0_1_2 in dev tree can effectively
avoid the idle hang issue, but it will affect the system power.
(Before root cause, this is a short term workaround to unblock function test.)

BUG=b:287170545
TEST=Able to idle for more than 5+ hours without any hang.

Signed-off-by: Wentao Qin 
Change-Id: I0947815ab79b470d2ae922cffdd8250c60cf1afd
---
M src/mainboard/google/rex/variants/screebo/overridetree.cb
1 file changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/20/77520/5