[S] Change in coreboot[master]: mb/google/rex: Disable stage cache

[Subrata Banik (Code Review)]

Attention is currently required from: Tarun Tuli, Reka Norman, Kapil Porwal, Ivy Jian, Eric Lai.

Hello Tarun Tuli, Reka Norman, Kapil Porwal, Ivy Jian, Eric Lai,

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

https://review.coreboot.org/c/coreboot/+/71695

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

Change subject: mb/google/rex: Disable stage cache
......................................................................

mb/google/rex: Disable stage cache

This patch disables the stage cache to save boot time.

Note: S3 is not POR for Intel MTL mobile skus.

Boot time is reduced by ~8ms.

Boot time before:
   4:end of romstage                1,391,225 (13,724)
 100:start of postcar               1,403,339 (12,114)

Boot time after:
   4:end of romstage                1,380,262 (5,618)
 100:start of postcar               1,392,323 (12,060)

Change-Id: I9775fc628f345a514894f30435a374e2ffa057c1
Signed-off-by: Subrata Banik 
---
M src/mainboard/google/rex/Kconfig
1 file changed, 25 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/95/71695/2