video: move MXS to Kconfig

Move CONFIG_VIDEO_MXS from board headers to Kconfig
and drop it from obsolete cfb_console driver.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/include/configs/mx7dsabresd.h b/include/configs/mx7dsabresd.h
index 397af53..92ce741 100644
--- a/include/configs/mx7dsabresd.h
+++ b/include/configs/mx7dsabresd.h
@@ -126,8 +126,7 @@
 
 #define CONFIG_USBD_HS
 
-#ifdef CONFIG_VIDEO
-#define CONFIG_VIDEO_MXS
+#ifdef CONFIG_DM_VIDEO
 #define CONFIG_VIDEO_LOGO
 #define CONFIG_VIDEO_BMP_LOGO
 #endif