configs: colibri-imx7: enable watchdog

Enable watchdog functionality for Toradex's Colibri iMX7 (NAND/EMMC)
modules.

Signed-off-by: Parth Pancholi <parth.pancholi@toradex.com>
diff --git a/configs/colibri_imx7_emmc_defconfig b/configs/colibri_imx7_emmc_defconfig
index 3382371..9d4423c 100644
--- a/configs/colibri_imx7_emmc_defconfig
+++ b/configs/colibri_imx7_emmc_defconfig
@@ -85,10 +85,12 @@
 CONFIG_PMIC_RN5T567=y
 CONFIG_MXC_UART=y
 CONFIG_IMX_THERMAL=y
+CONFIG_IMX_WATCHDOG=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="Toradex"
 CONFIG_USB_GADGET_VENDOR_NUM=0x1b67
 CONFIG_USB_GADGET_PRODUCT_NUM=0x4000
+CONFIG_WDT=y
 CONFIG_CI_UDC=y