mb/google/fatcat/var/fatcat: add support for wifi sar table

Add wifi sar table support for fatcat. Bit 4-5 in CBI/FW_CONFIG
is used to select different sar table (index 0 to 3).

BUG=b:348678529
TEST=emerge-fatcat coreboot chromeos-bootimage

Change-Id: I2d82f76d7c11378ee5c221a6b9621b4cba83720d
Signed-off-by: YH Lin <yueherngl@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84556
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Reviewed-by: Pranava Y N <pranavayn@google.com>

src/mainboard/google/fatcat/Kconfig

@@ -8,6 +8,8 @@ config BOARD_GOOGLE_FATCAT_COMMON
 	select EC_GOOGLE_CHROMEEC_BOARDID
 	select EC_GOOGLE_CHROMEEC_ESPI
 	select EC_GOOGLE_CHROMEEC_SKUID
+	select FW_CONFIG
+	select FW_CONFIG_SOURCE_CHROMEEC_CBI
 	select GOOGLE_SMBIOS_MAINBOARD_VERSION
 	select HAVE_ACPI_TABLES
 	select I2C_TPM
@@ -25,6 +27,7 @@ config BOARD_GOOGLE_FATCAT_COMMON
 config BOARD_GOOGLE_BASEBOARD_FATCAT
 	def_bool n
 	select BOARD_GOOGLE_FATCAT_COMMON
+	select CHROMEOS_WIFI_SAR if CHROMEOS
 	select HAVE_SLP_S0_GATE
 	select MAINBOARD_HAS_CHROMEOS
 	select MEMORY_SOLDERDOWN
@@ -55,6 +58,14 @@ config CHROMEOS
 	select GBB_FLAG_FORCE_MANUAL_RECOVERY
 	select HAS_RECOVERY_MRC_CACHE
 
+config CHROMEOS_WIFI_SAR
+	bool "Enable SAR options for ChromeOS build"
+	depends on CHROMEOS
+	select DSAR_ENABLE
+	select GEO_SAR_ENABLE
+	select SAR_ENABLE
+	select USE_SAR
+
 config DEVICETREE
 	default "variants/baseboard/\$(CONFIG_BASEBOARD_DIR)/devicetree.cb"
 

src/mainboard/google/fatcat/variants/fatcat/Makefile.mk

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

src/mainboard/google/fatcat/variants/fatcat/variant.c

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