imx: move CONFIG_VIDEO_IPUV3 to defconfigs

Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/configs/nitrogen6s1g_defconfig b/configs/nitrogen6s1g_defconfig
index 1d3f015..b920db0 100644
--- a/configs/nitrogen6s1g_defconfig
+++ b/configs/nitrogen6s1g_defconfig
@@ -59,5 +59,6 @@
 CONFIG_USB_ETHER=y
 CONFIG_USB_ETH_CDC=y
 CONFIG_VIDEO=y
+CONFIG_VIDEO_IPUV3=y
 # CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_OF_LIBFDT=y