ARM: dts: add imx7d-sdb support

add imx7d sdb board support

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index c94396e..50d8b54 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -317,6 +317,8 @@
 	imx6sx-sabreauto.dtb \
 	imx6sx-sdb-reva.dtb \
 	imx6sx-sdb.dtb
+dtb-$(CONFIG_SOC_IMX7D) += \
+	imx7d-sdb.dtb
 dtb-$(CONFIG_SOC_LS1021A) += \
 	ls1021a-qds.dtb \
 	ls1021a-twr.dtb