arm: dts: imx7: colibri: split dt for raw NAND and eMMC devices

In preparation of adding CONFIG_DM_MMC support use separate device
trees for raw NAND and eMMC devices.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
diff --git a/configs/colibri_imx7_defconfig b/configs/colibri_imx7_defconfig
index 5a49623..2e4350c 100644
--- a/configs/colibri_imx7_defconfig
+++ b/configs/colibri_imx7_defconfig
@@ -44,7 +44,7 @@
 CONFIG_CMD_UBI=y
 CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
-CONFIG_DEFAULT_DEVICE_TREE="imx7-colibri"
+CONFIG_DEFAULT_DEVICE_TREE="imx7-colibri-rawnand"
 CONFIG_ENV_IS_IN_NAND=y
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 CONFIG_DFU_MMC=y