mb/google/brya/var/banshee: Add WiFi SAR table

Add WiFi SAR table

BUG=b:225285426
TEST=emerge-brya chromeos-config chromeos-config-bsp-private
coreboot-private-files-baseboard-brya coreboot chromeos-bootimage
and checked SAR table can load by WiFi driver.

Signed-off-by: Frank Wu <frank_wu@compal.corp-partner.google.com>
Change-Id: I8fa833409bd69e080fda735c89015b9548252190
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62846
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/brya/Kconfig.name

@@ -172,6 +172,7 @@ config BOARD_GOOGLE_BANSHEE
 	bool "->  Banshee"
 	select BOARD_GOOGLE_BASEBOARD_BRYA
 	select MEMORY_SODIMM
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 
 config BOARD_GOOGLE_CROTA
 	bool "->  Crota"

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

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

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

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