mb/google/brya/var/vell: Add Wifi SAR for vell

Add wifi sar for vell

BUG=b:218992598
TEST=emerge-brya coreboot-private-files-baseboard-brya coreboot chromeos-bootimage

Change-Id: I74fddd1dbcb7019fd5fe394da291f125f0d4960f
Signed-off-by: Robert Chen <robert.chen@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61761
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/brya/Kconfig.name

@@ -160,6 +160,7 @@ config BOARD_GOOGLE_VELL
 	select DRIVERS_GFX_GENERIC
 	select DRIVERS_INTEL_MIPI_CAMERA
 	select SOC_INTEL_COMMON_BLOCK_IPU
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 
 config BOARD_GOOGLE_VOLMAR
 	bool "->  Volmar"

src/mainboard/google/brya/variants/vell/Makefile.inc

@@ -3,3 +3,4 @@ bootblock-y += gpio.c
 romstage-y += memory.c
 romstage-y += gpio.c
 ramstage-y += gpio.c
+ramstage-y += variant.c

src/mainboard/google/brya/variants/vell/variant.c

@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <sar.h>
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	return "wifi_sar_0.hex";
+}