drm: make DRM_STM default n

Default config value for all other drivers is N.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/stm/Kconfig

@@ -7,7 +7,6 @@ config DRM_STM
 	select DRM_PANEL
 	select VIDEOMODE_HELPERS
 	select FB_PROVIDE_GET_FB_UNMAPPED_AREA
-	default y
 
 	help
 	  Enable support for the on-chip display controller on