mb/google/rex: Add FW_CONFIG for FP/UWB/WIFI

This patch adds FW_CONFIG to accommodate different Rex BoM
components across various SKUs.
1. Fingerprint sensor - FP Present/Absent
2. Ultra wideband - UWB Absent/Using BITBANG/Using GSPI1
3. WIFI - CNVi/PCIe

TEST=Able to build and boot google/rex.

Change-Id: I97b0dc25f239103a0a235f14b50008a633e2f88d
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74146
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: YH Lin <yueherngl@google.com>

src/mainboard/google/rex/variants/rex0/overridetree.cb

@@ -28,6 +28,19 @@ fw_config
 		option USB4_ANX7452		3
 		option USB4_HAYDEN_BRIDGE	4
 	end
+	field FP 15
+		option FP_PRESENT		0
+		option FP_ABSENT		1
+	end
+	field UWB 16 17
+		option UWB_ABSENT		0
+		option UWB_BITBANG		1
+		option UWB_GSPI1		2
+	end
+	field WIFI 18
+		option WIFI_CNVI		0
+		option WIFI_PCIE		1
+	end
 end
 
 chip soc/intel/meteorlake