google/storm: enable virtual development mode switch

The whirlwind device is using a button instead of the switch to enable
dev mode.

BRANCH=storm
BUG=chrome-os-partner:36059
TEST=with the rest of the patches applied it is possible to enable and
     disable dev mode on Whirlwind and the mode persists over reboots.

Change-Id: I6d31c8429ea0515bea2b7d707325d9092487048a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 495bd07e3a1d6c587a5f01efa2801d2c4e7edbe8
Original-Change-Id: I8879833ca13074e8275393c3b98df06d56a5361d
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/261416
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/9875
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/mainboard/google/storm/Kconfig b/src/mainboard/google/storm/Kconfig
index 65b3ed4..16c8b21 100644
--- a/src/mainboard/google/storm/Kconfig
+++ b/src/mainboard/google/storm/Kconfig
@@ -33,6 +33,7 @@
 	select SPI_FLASH
 	select SPI_FLASH_SPANSION
 	select SPI_FLASH_STMICRO
+	select VIRTUAL_DEV_SWITCH
 	select WIPEOUT_SUPPORTED
 
 config BOARD_VARIANT_AP148
diff --git a/src/mainboard/google/storm/chromeos.c b/src/mainboard/google/storm/chromeos.c
index 0448206..0076b3c 100644
--- a/src/mainboard/google/storm/chromeos.c
+++ b/src/mainboard/google/storm/chromeos.c
@@ -62,7 +62,7 @@
 
 int get_developer_mode_switch(void)
 {
-	return read_gpio(DEV_SW) ^ !DEV_POL;
+	return 0;
 }
 
 /*