arm64: dts: ls1088a: Revise gpio registers to little-endian

Since fsl-ls1088a Soc GPIO registers are used as little endian,
the patch adds the little-endian attribute to each gpio node.
Signed-off-by: Chuanhua Han <chuanhua.han@nxp.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -272,6 +272,7 @@ gpio0: gpio@2300000 {
 			compatible = "fsl,qoriq-gpio";
 			reg = <0x0 0x2300000 0x0 0x10000>;
 			interrupts = <0 36 IRQ_TYPE_LEVEL_HIGH>;
+			little-endian;
 			gpio-controller;
 			#gpio-cells = <2>;
 			interrupt-controller;
@@ -282,6 +283,7 @@ gpio1: gpio@2310000 {
 			compatible = "fsl,qoriq-gpio";
 			reg = <0x0 0x2310000 0x0 0x10000>;
 			interrupts = <0 36 IRQ_TYPE_LEVEL_HIGH>;
+			little-endian;
 			gpio-controller;
 			#gpio-cells = <2>;
 			interrupt-controller;
@@ -292,6 +294,7 @@ gpio2: gpio@2320000 {
 			compatible = "fsl,qoriq-gpio";
 			reg = <0x0 0x2320000 0x0 0x10000>;
 			interrupts = <0 37 IRQ_TYPE_LEVEL_HIGH>;
+			little-endian;
 			gpio-controller;
 			#gpio-cells = <2>;
 			interrupt-controller;
@@ -302,6 +305,7 @@ gpio3: gpio@2330000 {
 			compatible = "fsl,qoriq-gpio";
 			reg = <0x0 0x2330000 0x0 0x10000>;
 			interrupts = <0 37 IRQ_TYPE_LEVEL_HIGH>;
+			little-endian;
 			gpio-controller;
 			#gpio-cells = <2>;
 			interrupt-controller;