ARM64: zynqmp: Add support for zc1751-dc4

zc1751-dc4 contains four GEMs.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index e76f56b..ed897cf 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -90,6 +90,7 @@
 	zynqmp-zcu102-revB.dtb			\
 	zynqmp-zc1751-xm015-dc1.dtb		\
 	zynqmp-zc1751-xm016-dc2.dtb		\
+	zynqmp-zc1751-xm018-dc4.dtb		\
 	zynqmp-zc1751-xm019-dc5.dtb
 dtb-$(CONFIG_AM33XX) += am335x-boneblack.dtb am335x-bone.dtb am335x-evm.dtb \
 	am335x-evmsk.dtb \