arm64: dts: ls1028a: fix endian setting for dcfg

DCFG block uses little endian.  Fix it so that register access becomes
correct.
Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com>
Acked-by: Yangbo Lu <yangbo.lu@nxp.com>
Fixes: 8897f325 ("arm64: dts: Add support for NXP LS1028A SoC")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi

@@ -175,7 +175,7 @@ ddr: memory-controller@1080000 {
 		dcfg: syscon@1e00000 {
 			compatible = "fsl,ls1028a-dcfg", "syscon";
 			reg = <0x0 0x1e00000 0x0 0x10000>;
-			big-endian;
+			little-endian;
 		};
 
 		rst: syscon@1e60000 {