ARM64: zynqmp: Add one empty line between license and nodes

Sync with Linux kernel.
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynqmp.dtsi

@@ -7,6 +7,7 @@
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
+
 / {
 	compatible = "xlnx,zynqmp";
 	#address-cells = <2>;