arm64: dts: ls1088a: Added dcfg node in ls1088a dtsi

Add debug configuration node(DCFG) in dtsi, helps guts driver to
print the following information in kernel boot log

[    0.526649] Machine: LS1088A RDB Board
[    0.530430] SoC family: QorIQ LS1088A
[    0.534115] SoC ID: svr:0x87030010, Revision: 1.0
Signed-off-by: Amrita Kumari <amrita.kumari@nxp.com>
Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi

@@ -191,6 +191,12 @@ clockgen: clocking@1300000 {
 			clocks = <&sysclk>;
 		};
 
+		dcfg: dcfg@1e00000 {
+			compatible = "fsl,ls1088a-dcfg", "syscon";
+			reg = <0x0 0x1e00000 0x0 0x10000>;
+			little-endian;
+		};
+
 		tmu: tmu@1f80000 {
 			compatible = "fsl,qoriq-tmu";
 			reg = <0x0 0x1f80000 0x0 0x10000>;