mb/google/brox: Set up FW_CONFIG

Brox project has FW_CONFIG bits already set up in the project file for
the retimer and for storage, so make sure that the brox device tree
matches those settings.

BUG=b:311450057,b:300690448,b:319058143
BRANCH=None
TEST=emerge-brox coreboot chromeos-bootimage
     will check if this helps detect the storage device in the factory

Change-Id: Iaf43003b7e8210eee9016d779839d7048c15825f
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79854
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

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

@@ -1,3 +1,28 @@
+fw_config
+	field RETIMER 0 1
+		option RETIMER_UNKNOWN			0
+		option RETIMER_BYPASS			1
+		option RETIMER_JHL8040			2
+	end
+	field STORAGE 2 3
+		option STORAGE_UNKNOWN			0
+		option STORAGE_UFS			1
+		option STORAGE_NVME			2
+	end
+	field WIFI 4 4
+		option WIFI_CNVI			0
+		option WIFI_PCIE			1
+	end
+	field AUDIO 5 7
+		option AUDIO_UNKNOWN			0
+		option AUDIO_REALTEK_ALC256		1
+	end
+	field UFS_CAMERA 8 9
+		option UFS_CAMERA_NONE			0
+		option UFS_CAMERA_OV2740		1
+	end
+end
+
 chip soc/intel/alderlake
 	device domain 0 on
 		device ref igpu on