sunxi: video: Add support for VGA via external DACs connected to the LCD pins

Add support for external DACs connected to the parallel LCD interface driving
a VGA connector, such as found on the Olimex A13 boards.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index 61b4959..5959577 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -294,6 +294,15 @@
 	---help---
 	Say Y here to add support for outputting video over HDMI.
 
+config VIDEO_VGA_VIA_LCD
+	boolean "VGA via LCD controller support"
+	depends on VIDEO
+	default n
+	---help---
+	Say Y here to add support for external DACs connected to the parallel
+	LCD interface driving a VGA connector, such as found on the
+	Olimex A13 boards.
+
 config VIDEO_LCD_MODE
 	string "LCD panel timing details"
 	depends on VIDEO