ARM64: zynqmp: Add ddrc node in dts

This patch adds ddrc memory controller node in dts.
size mentioned in dts is 0x30000, because we need to access DDR_QOS
INTR registers located at fd090208 from this driver.

Signed-off-by: Naga Sureshkumar Relli <nagasure@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynqmp.dtsi

@@ -506,6 +506,13 @@
 			power-domains = <&pd_adma>;
 		};
 
+		mc: memory-controller@fd070000 {
+			compatible = "xlnx,zynqmp-ddrc-2.40a";
+			reg = <0x0 0xfd070000 0x30000>;
+			interrupt-parent = <&gic>;
+			interrupts = <0 112 4>;
+		};
+
 		nand0: nand@ff100000 {
 			compatible = "arasan,nfc-v3p10";
 			status = "disabled";