ARM: dts: mxs: Add MSR M28CU3 board

This board is based on the M28 SoM with custom baseboard. Supported
are LEDs, ethernet, PWM, LCD, SD slots.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 9095610..3043e6c 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -159,6 +159,7 @@
 	imx28-cfa10057.dtb \
 	imx28-cfa10058.dtb \
 	imx28-evk.dtb \
+	imx28-m28cu3.dtb \
 	imx28-m28evk.dtb \
 	imx28-sps1.dtb \
 	imx28-tx28.dtb