mb/google/myst: Add FW_CONFIG

Add initial FW_CONFIG for the myst program.

BUG=b:
TEST=builds

Cq-Depend: chrome-internal:5674351
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Change-Id: If74c3649d4e8d174d9fe00a4b896c2351ee3ab19
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74102
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

src/mainboard/google/myst/Kconfig

@@ -10,6 +10,8 @@ config BOARD_SPECIFIC_OPTIONS
 	select BOARD_ROMSIZE_KB_16384
 	select EC_GOOGLE_CHROMEEC
 	select EC_GOOGLE_CHROMEEC_ESPI
+	select FW_CONFIG
+	select FW_CONFIG_SOURCE_CHROMEEC_CBI
 	select MAINBOARD_HAS_CHROMEOS
 	select SOC_AMD_PHOENIX
 

src/mainboard/google/myst/variants/myst/overridetree.cb

@@ -1,4 +1,33 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
+fw_config
+	field FORM_FACTOR 0
+		option FORM_FACTOR_CLAMSHELL 0
+		option FORM_FACTOR_CONVERTIBLE 1
+	end
+	field FP 1 2
+		option DISABLED 0
+		option UART 1
+		option SPI 2
+	end
+	field WLAN 3 4
+		option WLAN_MT7922 0
+		option WLAN_MT7925 1
+	end
+	field WWAN 5 6
+		option WWAN_DIASABLED 0
+		option WWAN_FM101GL 1
+	end
+	field DAUGHTERBOARD 7 9
+		option DISABLED 0
+		option DB_A 1
+		option DB_B 2
+	end
+	field KB_BL 10
+		option DISABLED 0
+		option ENABLED 1
+	end
+end
+
 chip soc/amd/phoenix
 	device domain 0 on end # domain
 end	# chip soc/amd/phoenix