video: Show the U-Boot logo by default

Enable this for boards with a display, unless they are using the SPLASH
feature.

This shows a U-Boot logo on boards with a display, which seems like a
useful thing.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index e601b47..cfa08b5 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -17,6 +17,7 @@
 config VIDEO_LOGO
 	bool "Show the U-Boot logo on the display"
 	depends on DM_VIDEO
+	default y if !SPLASH_SCREEN
 	select VIDEO_BMP_RLE8
 	help
 	  This enables showing the U-Boot logo on the display when a video