haswell boards: Enable VIRTUAL_DEV_SWITCH

This config option was not enabled which was preventing
the user from enabling developer mode from recovery mode.

With this enabled we can disable the "dev mode by default"
behavior and let people enable it by entering recovery mode.

This will make the firmware behave like a typical chromeos
device.

Peppy is left in "default dev mode" until after bringup.

1) boot slippy in normal mode by default
2) enter recovery mode with servo button
3) Ctrl+D on USB keyboard to enter developer mode
4) boot slippy in developer mode

Change-Id: I414c0d10dd0489e3c89798f75a2872a43297c8d8
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/57350
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4220
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/google/falco/Kconfig

@@ -10,6 +10,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select BOARD_ROMSIZE_KB_8192
 	select EC_GOOGLE_CHROMEEC
 	select EC_SOFTWARE_SYNC
+	select VIRTUAL_DEV_SWITCH
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME

src/mainboard/google/falco/chromeos.c

@@ -83,7 +83,7 @@ void fill_lb_gpios(struct lb_gpios *gpios)
 /* The dev-switch is virtual */
 int get_developer_mode_switch(void)
 {
-	return 1;
+	return 0;
 }
 
 /* There are actually two recovery switches. One is the magic keyboard chord,

src/mainboard/google/peppy/Kconfig

@@ -10,6 +10,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select BOARD_ROMSIZE_KB_8192
 	select EC_GOOGLE_CHROMEEC
 	select EC_SOFTWARE_SYNC
+	select VIRTUAL_DEV_SWITCH
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME

src/mainboard/google/slippy/Kconfig

@@ -10,6 +10,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select BOARD_ROMSIZE_KB_8192
 	select EC_GOOGLE_CHROMEEC
 	select EC_SOFTWARE_SYNC
+	select VIRTUAL_DEV_SWITCH
 	select HAVE_ACPI_TABLES
 	select HAVE_OPTION_TABLE
 	select HAVE_ACPI_RESUME

src/mainboard/google/slippy/chromeos.c

@@ -83,7 +83,7 @@ void fill_lb_gpios(struct lb_gpios *gpios)
 /* The dev-switch is virtual */
 int get_developer_mode_switch(void)
 {
-	return 1;
+	return 0;
 }
 
 /* There are actually two recovery switches. One is the magic keyboard chord,