configs: enable device tree for Colibri iMX7

Enable device tree configuration and specify default device tree
for Toradex Colibri iMX7.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>

configs/colibri_imx7_defconfig

@@ -3,6 +3,7 @@ CONFIG_ARCH_MX7=y
 CONFIG_TARGET_COLIBRI_IMX7=y
 CONFIG_IMX_RDC=y
 CONFIG_IMX_BOOTAUX=y
+CONFIG_DEFAULT_DEVICE_TREE="imx7-colibri"
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/toradex/colibri_imx7/imximage.cfg,MX7D"
 CONFIG_BOOTDELAY=1
 CONFIG_HUSH_PARSER=y
@@ -30,8 +31,16 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_CMD_UBI=y
+CONFIG_OF_CONTROL=y
+CONFIG_OF_EMBED=y
 CONFIG_DFU_MMC=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_I2C=y
 CONFIG_MTD_UBI_FASTMAP=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX7=y
+CONFIG_DM_PMIC=y
+CONFIG_PMIC_RN5T567=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_STORAGE=y
@@ -41,4 +50,3 @@ CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_G_DNL_MANUFACTURER="Toradex"
 CONFIG_G_DNL_VENDOR_NUM=0x1b67
 CONFIG_G_DNL_PRODUCT_NUM=0x4020
-CONFIG_OF_LIBFDT=y