ARM: dts: ls1021a: Add memory controller

The LS1021A has a memory controller that supports EDAC. This commit
adds an entry for it.
Signed-off-by: Patrick Havelange <patrick.havelange@essensium.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/ls1021a.dtsi

@@ -125,6 +125,13 @@ soc {
 		interrupt-parent = <&gic>;
 		ranges;
 
+		ddr: memory-controller@1080000 {
+			compatible = "fsl,qoriq-memory-controller";
+			reg = <0x0 0x1080000 0x0 0x1000>;
+			interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
+			big-endian;
+		};
+
 		gic: interrupt-controller@1400000 {
 			compatible = "arm,gic-400", "arm,cortex-a7-gic";
 			#interrupt-cells = <3>;