mb/google/nissa/var/yaviks: Enable wifi SAR

Enable wifi sar function for yaviks.
Use the fw_config to separate SAR setting for different wifi card.

BUG=259199095
TEST=build, enabled iwlwifi debug, and check dmesg

Signed-off-by: Wisley Chen <wisley.chen@quanta.corp-partner.google.com>
Change-Id: I3ced65368ee66e084e58d66cff8f75147f665d71
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70750
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Reka Norman <rekanorman@chromium.org>

src/mainboard/google/brya/Kconfig.name

@@ -281,6 +281,7 @@ config BOARD_GOOGLE_YAVIKS
 	bool "->  Yaviks"
 	select BOARD_GOOGLE_BASEBOARD_NISSA
 	select DRIVERS_GENESYSLOGIC_GL9750
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 
 config BOARD_GOOGLE_LISBON
 	bool "->  Lisbon"

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

@@ -3,4 +3,5 @@ bootblock-y += gpio.c
 
 romstage-y += gpio.c
 
+ramstage-$(CONFIG_FW_CONFIG) += variant.c
 ramstage-y += gpio.c

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

@@ -1,3 +1,13 @@
+fw_config
+	field DB_USB 0 1
+		option DB_NONE			0
+		option DB_1C_1A			1
+        end
+	field WIFI_SAR_ID 2 3
+		option SAR_ID_0			0
+        end
+end
+
 chip soc/intel/alderlake
 	register "sagv" = "SaGv_Enabled"
 

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

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <fw_config.h>
+#include <sar.h>
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	if (fw_config_probe(FW_CONFIG(WIFI_SAR_ID, SAR_ID_0)))
+		return "wifi_sar_0.hex";
+
+	return NULL;
+}