[S] Change in coreboot[master]: mb/google/rex: Skip sending the MBP HOB to save boot time

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/68418 )

Change subject: mb/google/rex: Skip sending the MBP HOB to save boot time
......................................................................

mb/google/rex: Skip sending the MBP HOB to save boot time

This change is to skip sending the MBP HOB since coreboot doesn't
use it and also helps to reduce the boot time by ~40 ms.

Boot time data
Before:
* 955:returning from FspSiliconInit 1,656,985 (274,416)
After:
* 955:returning from FspSiliconInit 1,593,036 (233,286)

BUG=b:252410202
TEST=Verified that boot time is reduced by ~40 msec.

Signed-off-by: Wonkyu Kim 
Change-Id: I0d4f66940529b8d38d9658c769feba8b5c9b715e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68418
Reviewed-by: Tarun Tuli 
Tested-by: build bot (Jenkins) 
Reviewed-by: Subrata Banik 
Reviewed-by: Angel Pons 
Reviewed-by: Kapil Porwal 
---
M src/mainboard/google/rex/variants/rex0/overridetree.cb
1 file changed, 30 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Angel Pons: Looks good to me, approved
  Subrata Banik: Looks good to me, approved
  Tarun Tuli: Looks good to me, approved
  Kapil Porwal: Looks good to me, approved

diff --git a/src/mainboard/google/rex/variants/rex0/overridetree.cb b/src/mainboard/google/rex/variants/rex0/overridetree.cb
index 5cb3ad5..2e1c159 100644
--- a/src/mainboard/google/rex/variants/rex0/overridetree.cb
+++ b/src/mainboard/google/rex/variants/rex0/overridetree.cb
@@ -69,6 +69,8 @@
    	[PchSerialIoIndexI2C5] = PchSerialIoPci,
    }"

+	register "skip_mbp_hob" = "1"
+
    # Intel Common SoC Config
    #+-------------------+---------------------------+
    #| Field             |  Value                    |