mb/google/volteer/eldrid: Add option to enable WiFi SAR configs

This change adds a user selectable option to enable all WiFi SAR
configs that apply to volteer

BUG=b:168169690
TEST=1. cros-workon-volteer start
          coreboot-private-files-baseboard-volteer
     2. USE="project_eldrid" emerge-volteer chromeos-config
          coreboot-private-files-baseboard-volteer
     3. check wifi_sar-eldrid.hex in
          coreboot-private/3rdparty/blobs/baseboard-volteer

Change-Id: I6b74cd2b34ebb99cc59d456e28fd7ab2399d71d0
Signed-off-by: Malik_Hsu <malik_hsu@wistron.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45233
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/volteer/Kconfig

@@ -45,6 +45,15 @@ config CHROMEOS
 	select VBOOT_LID_SWITCH
 	select VBOOT_EARLY_EC_SYNC
 
+config CHROMEOS_WIFI_SAR
+	bool "Enable SAR options for Chrome OS build"
+	depends on CHROMEOS
+	select DSAR_ENABLE
+	select GEO_SAR_ENABLE
+	select SAR_ENABLE
+	select USE_SAR
+	select WIFI_SAR_CBFS
+
 config DIMM_SPD_SIZE
 	int
 	default 512