video: Rename CONFIG_DM_VIDEO to CONFIG_VIDEO

Now that all the old code is gone, rename this option. Driver model
migration is now complete.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/pico-imx6ul.h b/include/configs/pico-imx6ul.h
index 2ac48c4..c0d837d 100644
--- a/include/configs/pico-imx6ul.h
+++ b/include/configs/pico-imx6ul.h
@@ -102,9 +102,7 @@
 #define CONFIG_SYS_INIT_RAM_ADDR	IRAM_BASE_ADDR
 #define CONFIG_SYS_INIT_RAM_SIZE	IRAM_SIZE
 
-/* environment organization */
-
-#ifdef CONFIG_DM_VIDEO
+#ifdef CONFIG_VIDEO
 #define MXS_LCDIF_BASE MX6UL_LCDIF1_BASE_ADDR
 #endif