arm: dts: imx7d-sdb add basic dts

Add basic dts for i.MX7D-SDB board.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index a985c5d..e1a2b07 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -345,7 +345,8 @@
 	imx6ul-isiot-nand.dtb \
 	imx6ul-opos6uldev.dtb
 
-dtb-$(CONFIG_MX7) += imx7-colibri.dtb
+dtb-$(CONFIG_MX7) += imx7-colibri.dtb \
+	imx7d-sdb.dtb
 
 dtb-$(CONFIG_ARCH_MX7ULP) += imx7ulp-evk.dtb