[XS] Change in coreboot[master]: mb/google/dedede/var/taranza: Disable EXT_VR

[Sheng-Liang Pan (Code Review)]

Sheng-Liang Pan has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/76125?usp=email )

Change subject: mb/google/dedede/var/taranza: Disable EXT_VR
......................................................................

mb/google/dedede/var/taranza: Disable EXT_VR

The taranza removed the APW8738BQBI and
"disable_external_bypass_vr" should be set to "1" to disable

BUG=b:288978340
TEST=emerge-dedede coreboot

Signed-off-by: Sheng-Liang Pan 
Change-Id: I0a849fbfacba1d200c969c66bb058863d7ab3085
---
M src/mainboard/google/dedede/variants/taranza/overridetree.cb
1 file changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/25/76125/1

diff --git a/src/mainboard/google/dedede/variants/taranza/overridetree.cb b/src/mainboard/google/dedede/variants/taranza/overridetree.cb
index e3df1f2..fa8d409 100644
--- a/src/mainboard/google/dedede/variants/taranza/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/taranza/overridetree.cb
@@ -53,6 +53,9 @@
    register "DdiPortAHpd" = "1"
    register "DdiPortADdc" = "1"

+	# Does not support external vnn power rail
+	register "disable_external_bypass_vr" = "1"
+
    # USB Port Configuration
    register "usb2_ports[0]" = "{
    	.enable = 1,