imx: convert pico-imx6 to DM_VIDEO

Update defconfig to enable usage of converted ipuv3
driver DM configuration.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
diff --git a/configs/pico-imx6_defconfig b/configs/pico-imx6_defconfig
index 0bc7e4f..840ff14 100644
--- a/configs/pico-imx6_defconfig
+++ b/configs/pico-imx6_defconfig
@@ -73,5 +73,12 @@
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
+CONFIG_DM_VIDEO=y
 CONFIG_VIDEO_IPUV3=y
-CONFIG_VIDEO=y
+# CONFIG_BACKLIGHT is not set
+# CONFIG_CMD_VIDCONSOLE is not set
+# CONFIG_VIDEO_BPP8 is not set
+# CONFIG_VIDEO_BPP32 is not set
+# CONFIG_VIDEO_ANSI is not set
+# CONFIG_PANEL is not set
+CONFIG_SYS_WHITE_ON_BLACK=y