mb/google/brya/var/anahera: Enable SaGv

Enable SaGv support for anahera/anahera4es.

BUG=b:211362081
TEST=FW_NAME=anahera emerge-brya coreboot

Change-Id: I68c916dbc570759dba3a4c32fbb8ebfc6e387be4
Signed-off-by: Wisley Chen <wisley.chen@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60249
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
diff --git a/src/mainboard/google/brya/variants/anahera/overridetree.cb b/src/mainboard/google/brya/variants/anahera/overridetree.cb
index 97be625..1038798 100644
--- a/src/mainboard/google/brya/variants/anahera/overridetree.cb
+++ b/src/mainboard/google/brya/variants/anahera/overridetree.cb
@@ -33,6 +33,7 @@
 	register "gpio_pm[COMM_4]" = "0"
 	register "gpio_pm[COMM_5]" = "0"
 
+	register "SaGv" = "SaGv_Enabled"
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |
diff --git a/src/mainboard/google/brya/variants/anahera4es/overridetree.cb b/src/mainboard/google/brya/variants/anahera4es/overridetree.cb
index 97be625..1038798 100644
--- a/src/mainboard/google/brya/variants/anahera4es/overridetree.cb
+++ b/src/mainboard/google/brya/variants/anahera4es/overridetree.cb
@@ -33,6 +33,7 @@
 	register "gpio_pm[COMM_4]" = "0"
 	register "gpio_pm[COMM_5]" = "0"
 
+	register "SaGv" = "SaGv_Enabled"
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |