mainboard/intel/amenia: Enable VIRT_DEV_SWITCH

Enable virtual dev switch config.

BUG=None
TEST= On Dev FW screen, press SPACE key to boot to normal mode

Change-Id: I0fba36ed85025e4d17da106978dcc88497afee09
Signed-off-by: Ravi Sarawadi <ravishankar.sarawadi@intel.com>
Reviewed-on: https://review.coreboot.org/15080
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/intel/amenia/Kconfig

@@ -18,6 +18,7 @@ config BOARD_SPECIFIC_OPTIONS
 config CHROMEOS
 	bool
 	default y
+	select VIRTUAL_DEV_SWITCH
 
 config MAINBOARD_DIR
 	string