at91: video: Support driver-model for the HLCD driver

Add driver-model support to this driver.

Signed-off-by: Songjun Wu <songjun.wu@microchip.com>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index d1b017c..19e9745 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -371,6 +371,12 @@
 	   The devices provide a simple interface to start up the display,
 	   read display information and enable it.
 
+config ATMEL_HLCD
+	bool "Enable ATMEL video support using HLCDC"
+	depends on DM_VIDEO
+	help
+	   HLCDC supports video output to an attached LCD panel.
+
 config VIDEO_BROADWELL_IGD
 	bool "Enable Intel Broadwell integrated graphics device"
 	depends on X86