ARM: at91/dt: sama5d4: add dts for sama5d4 xplained board

Add at91 sama5d4 xplained board support.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index a1c776b..0fc67d7 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -42,6 +42,7 @@
 	sama5d34ek.dtb \
 	sama5d35ek.dtb \
 	sama5d36ek.dtb \
+	at91-sama5d4_xplained.dtb \
 	at91-sama5d4ek.dtb
 dtb-$(CONFIG_ARCH_ATLAS6) += \
 	atlas6-evb.dtb