video: ipuv3: remove non-DM code

All ipuv3 users have been converted, drop obsolete code.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/drivers/video/imx/Kconfig b/drivers/video/imx/Kconfig
index c33620e..78eb0f2 100644
--- a/drivers/video/imx/Kconfig
+++ b/drivers/video/imx/Kconfig
@@ -1,7 +1,7 @@
 
 config VIDEO_IPUV3
 	bool "i.MX IPUv3 Core video support"
-	depends on (VIDEO || DM_VIDEO) && (MX5 || MX6)
+	depends on DM_VIDEO && (MX5 || MX6)
 	help
 	  This enables framebuffer driver for i.MX processors working
 	  on the IPUv3(Image Processing Unit) internal graphic processor.