mb/google/nissa/var/joxer: Add WiFi SAR table

Add WiFi SAR table for joxer.

BUG=b:239788985
TEST=build FW and checked SAR table can load by WiFi driver.

Signed-off-by: Mark Hsieh <mark_hsieh@wistron.corp-partner.google.com>
Change-Id: Ia8dddf454e441840233fa4405704ee1f0a8ed86c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66522
Reviewed-by: Reka Norman <rekanorman@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/brya/Kconfig.name

@@ -256,6 +256,7 @@ config BOARD_GOOGLE_JOXER
 	bool "->  Joxer"
 	select ALDERLAKE_CONFIGURE_DESCRIPTOR
 	select BOARD_GOOGLE_BASEBOARD_NISSA
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 	select DRIVERS_GENESYSLOGIC_GL9750
 
 config BOARD_GOOGLE_PUJJO

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

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

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

@@ -4,6 +4,12 @@
 #include <console/console.h>
 #include <fw_config.h>
 #include <soc/bootblock.h>
+#include <sar.h>
+
+const char *get_wifi_sar_cbfs_filename(void)
+{
+	return "wifi_sar_0.hex";
+}
 
 /*
  * TODO(b/229022567): This is a workaround which will be removed once we