mb/google/nissa/var/gothrax: Add wifi sar table

Add AX211 wifi sar table for gothrax wifi sar config.
Use fw_config to separate different wifi card settings.

WLAN_AX211_Intel: 1

BUG=b:454207611
Test=emerge-nissa coreboot

Signed-off-by: Yunlong Jia <yunlong.jia@ecs.corp-partner.google.com>
Change-Id: I11cf6cd61a13f5365530fc07b589d749c9459d26
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90763
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>

src/mainboard/google/brya/Kconfig

@@ -303,6 +303,7 @@ config BOARD_GOOGLE_GOTHRAX
 	select DRIVERS_I2C_SX9324
 	select DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER
 	select HAVE_WWAN_POWER_SEQUENCE
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 
 config BOARD_GOOGLE_GUREN
 	select BOARD_GOOGLE_BASEBOARD_NISSA

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

@@ -4,6 +4,7 @@
 #include <baseboard/variants.h>
 #include <console/console.h>
 #include <fw_config.h>
+#include <sar.h>
 
 void variant_update_soc_chip_config(struct soc_intel_alderlake_config *config)
 {
@@ -40,3 +41,8 @@ void variant_update_soc_chip_config(struct soc_intel_alderlake_config *config)
 		config->typec_aux_bias_pads[1].pad_auxn_dc = 0x00;
 	}
 }
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	return get_wifi_sar_fw_config_filename(FW_CONFIG_FIELD(WLAN));
+}