imx6: isiotmx6ul: Add NAND support

Add NAND support for Engicam Is.IoT MX6UL board.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a4a4b1e..9012f69 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -317,7 +317,8 @@
 	imx6q-icore-rqs.dtb \
 	imx6sx-sabreauto.dtb \
 	imx6ul-geam-kit.dtb \
-	imx6ul-isiot-mmc.dtb
+	imx6ul-isiot-mmc.dtb \
+	imx6ul-isiot-nand.dtb
 
 dtb-$(CONFIG_MX7) += imx7-colibri.dtb