mb/facebook/watson: Select no UART on SuperIO

Select NO_UART_ON_SUPERIO as the SoC internal UART is used.

The current code is working, so this is just a cosmetic fix to remove
some unused options from Kconfig.

Change-Id: I206557c397da74b572e669feb1e38f0c8473d0d9
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35151
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/facebook/watson/Kconfig

@@ -11,6 +11,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select MAINBOARD_USES_IFD_GBE_REGION
 	select MAINBOARD_HAS_LPC_TPM
 	select MAINBOARD_HAS_TPM1
+	select NO_UART_ON_SUPERIO
 
 config MAINBOARD_DIR
 	string