mb/google/brya/var/crota: enable wifi sar

BUG=b:216594621
BRANCH=brya
TEST=build pass and SAR table be changed according to tablet/ desktop mode

Signed-off-by: Scott Chao <scott_chao@wistron.corp-partner.google.com>
Change-Id: I62265e8931da48d20cf41e0c91ccb1a5b4bc1167
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64096
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/google/brya/Kconfig.name

@@ -186,6 +186,7 @@ config BOARD_GOOGLE_BANSHEE
 config BOARD_GOOGLE_CROTA
 	bool "->  Crota"
 	select BOARD_GOOGLE_BASEBOARD_BRYA
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 	select DRIVERS_I2C_CS42L42
 
 config BOARD_GOOGLE_MOLI

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

@@ -4,3 +4,5 @@ romstage-y += gpio.c
 romstage-y += memory.c
 
 ramstage-y += gpio.c
+
+ramstage-y += variant.c

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

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <sar.h>
+#include <chip.h>
+#include <fw_config.h>
+#include <baseboard/variants.h>
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	return "wifi_sar_0.hex";
+}