intel/amenia: Select UART_FOR_CONSOLE for amenia

Set default value for UART port

BUG=chrome-os-partner:51844
TEST=Boot to chrome and check console

Change-Id: I5e76066e0ff531303595dcd5a99f2f8db379e89b
Signed-off-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-on: https://review.coreboot.org/16133
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/mainboard/intel/amenia/Kconfig

@@ -49,4 +49,8 @@ config DRIVERS_GENERIC_MAX98357A
 config DRIVERS_I2C_DA7219
 	default y
 
+config UART_FOR_CONSOLE
+	int
+	default 2
+
 endif # BOARD_INTEL_AMENIA