mb/system76: Select CBFS SMBIOS hooks

Multiple users have requested to have the DMI values for product UUID
and serial number be populated. Enable the drivers so that we may set
them when flashing or updating firmware.

Change-Id: I710363d9df626d51756a265f0099f26ef28411c2
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76153
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jeremy Soller <jeremy@system76.com>

src/mainboard/system76/addw1/Kconfig

@@ -3,6 +3,8 @@ if BOARD_SYSTEM76_ADDW1 || BOARD_SYSTEM76_ADDW2
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ROMSIZE_KB_16384
+	select DRIVERS_GENERIC_CBFS_SERIAL
+	select DRIVERS_GENERIC_CBFS_UUID
 	select DRIVERS_I2C_HID
 	select DRIVERS_I2C_TAS5825M
 	select EC_SYSTEM76_EC