arm: dts: imx7: add basic i.MX 7/Colibri iMX7 device tree

Add base device for NXP i.MX 7Solo/7Dual. The two SoC are very
similar and hence can share the same device tree for boot loaders
purpose.

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index efdd1ff..532527d 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -283,6 +283,8 @@
 
 dtb-$(CONFIG_MX6) += imx6ull-14x14-evk.dtb
 
+dtb-$(CONFIG_MX7) += imx7-colibri.dtb
+
 dtb-$(CONFIG_SOC_KEYSTONE) += k2hk-evm.dtb \
 	k2l-evm.dtb \
 	k2e-evm.dtb \