Quoting Vabhav Sharma (2018-10-14 19:58:15)

quoted

quoted

+
+   pmu {
+           compatible = "arm,cortex-a72-pmu";
+           interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
+   };
+
+   psci {
+           compatible = "arm,psci-0.2";
+           method = "smc";
+   };
+
+   memory at 80000000 {
+           // DRAM space - 1, size : 2 GB DRAM
+           device_type = "memory";
+           reg = <0x00000000 0x80000000 0 0x80000000>;
+   };
+
+   ddr1: memory-controller at 1080000 {
+           compatible = "fsl,qoriq-memory-controller";
+           reg = <0x0 0x1080000 0x0 0x1000>;
+           interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
+           little-endian;
+   };
+
+   ddr2: memory-controller at 1090000 {
+           compatible = "fsl,qoriq-memory-controller";
+           reg = <0x0 0x1090000 0x0 0x1000>;
+           interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+           little-endian;
+   };
+
+   sysclk: sysclk {

Name the node a bit generic like clock-xxx.

There is only one clock-unit, Bootloader(U-boot) require sysclk node during device tree fix-up as different platform support varied platform frequency as per reset configuration word used.
Referred other ARM based platform with one clock using name as x: x

Please add a comment above this node with this information. Newcomers
reading this DTS file won't have any idea why this node is specially
named and a comment will help tremendously here.