Google Kconfig: Add MAINBOARD_HAS_NATIVE_VGA_INIT in good places

Add 'select MAINBOARD_HAS_NATIVE_VGA_INIT' which is just used as a gate
symbol to display MAINBOARD_DO_NATIVE_VGA_INIT to the mainboards that
are already selecting MAINBOARD_DO_NATIVE_VGA_INIT.

Since MAINBOARD_HAS_NATIVE_VGA_INIT is not used in any code, this should
not have any other effects.

This fixes the warning:
warning: (BOARD_SPECIFIC_OPTIONS) selects MAINBOARD_DO_NATIVE_VGA_INIT
which has unmet direct dependencies (VENDOR_ASUS && BOARD_ASUS_KFSN4_DRE
|| MAINBOARD_HAS_NATIVE_VGA_INIT)

Change-Id: I8ceee69ebae90dc32f55df58c2e80fe25397f049
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/11301
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/mainboard/google/veyron_mickey/Kconfig b/src/mainboard/google/veyron_mickey/Kconfig
index 3c90dcc..ee48276 100644
--- a/src/mainboard/google/veyron_mickey/Kconfig
+++ b/src/mainboard/google/veyron_mickey/Kconfig
@@ -25,6 +25,7 @@
 	select BOARD_ROMSIZE_KB_4096
 	select COMMON_CBFS_SPI_WRAPPER
 	select HAVE_HARD_RESET
+	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_DO_NATIVE_VGA_INIT
 	select MAINBOARD_HAS_CHROMEOS
 	select RAM_CODE_SUPPORT