pico-imx7d: defconfig: Add DT file hooks

This patch adds DT file hooks for Pico i.MX7D SOM and variant boards

Signed-off-by: Joris Offouga <offougajoris@gmail.com>
diff --git a/configs/pico-pi-imx7d_defconfig b/configs/pico-pi-imx7d_defconfig
index c8ac2ff..05d5fe5 100644
--- a/configs/pico-pi-imx7d_defconfig
+++ b/configs/pico-pi-imx7d_defconfig
@@ -16,6 +16,8 @@
 CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/mach-imx/spl_sd.cfg"
 CONFIG_BOOTCOMMAND="run findfdt; run finduuid; run distro_bootcmd"
 CONFIG_DEFAULT_FDT_FILE="imx7d-pico-pi.dtb"
+CONFIG_OF_CONTROL=y
+CONFIG_DEFAULT_DEVICE_TREE="imx7d-pico-pi"
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_SPL_I2C_SUPPORT=y
 CONFIG_SPL_USB_HOST_SUPPORT=y
@@ -58,4 +60,3 @@
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
 CONFIG_VIDEO=y
-CONFIG_OF_LIBFDT=y