at91sam9n12ek: disable obsolete VIDEO config

DM_VIDEO conversion deadline has passed, disable VIDEO config.
Boards should convert to DM_VIDEO if they need video console
support.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Cc: Eugen Hristev <eugen.hristev@microchip.com>
diff --git a/configs/at91sam9n12ek_mmc_defconfig b/configs/at91sam9n12ek_mmc_defconfig
index 23be41e..15a4335 100644
--- a/configs/at91sam9n12ek_mmc_defconfig
+++ b/configs/at91sam9n12ek_mmc_defconfig
@@ -62,4 +62,4 @@
 CONFIG_DM_USB=y
 CONFIG_USB_STORAGE=y
 CONFIG_ATMEL_HLCD=y
-CONFIG_LCD=y
+# CONFIG_LCD is not set