mb/google/brya/var/kano: Update the FIVR configurations

This patch set disables the external voltage rails since kano
board doesn't have V1p05 and Vnn bypass rails implemented.

BUG=b:192370253
TEST=FW_NAME=kano emerge-brya coreboot and verify it builds
without error.

Signed-off-by: David Wu <david_wu@quanta.corp-partner.google.com>
Change-Id: Ia1f3f4b2ada0154c716aedd521d4151124411ba3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58569
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/brya/variants/kano/overridetree.cb

@@ -11,6 +11,12 @@ end
 chip soc/intel/alderlake
 	register "SaGv" = "SaGv_Enabled"
 
+	# FIVR configurations for kano are disabled since the board doesn't have V1p05 and Vnn
+	# bypass rails implemented.
+	register "ext_fivr_settings" = "{
+		.configure_ext_fivr = 1,
+	}"
+
 	# Intel Common SoC Config
 	#+-------------------+---------------------------+
 	#| Field             |  Value                    |