ARM: dts: imx6: add new board RIoTboard

add element14s RIoTboard http://www.riotboard.org which is an i.MX6Solo
based design targeted at makers.

Signed-off-by: Iain Paton<ipaton0@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/boot/dts/Makefile

@@ -182,6 +182,7 @@ dtb-$(CONFIG_ARCH_MXC) += \
 	imx6dl-hummingboard.dtb \
 	imx6dl-nitrogen6x.dtb \
 	imx6dl-phytec-pbab01.dtb \
+	imx6dl-riotboard.dtb \
 	imx6dl-sabreauto.dtb \
 	imx6dl-sabrelite.dtb \
 	imx6dl-sabresd.dtb \