arm64: zynqmp: Add support for zynqmp fpga manager

Add support for zynqmp fpga manager.

Signed-off-by: Nava kishore Manne <nava.manne@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
[m.tretter@pengutronix.de: moved to subnode of firmware]
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>

arch/arm64/boot/dts/xilinx/zynqmp.dtsi

@@ -119,6 +119,10 @@
 		zynqmp_firmware: zynqmp-firmware {
 			compatible = "xlnx,zynqmp-firmware";
 			method = "smc";
+
+			zynqmp_pcap: pcap {
+				compatible = "xlnx,zynqmp-pcap-fpga";
+			};
 		};
 	};