arm64: dts: fsl: fix endianness issue of rcpm

Add little-endian property to RCPM node (for ls1028a,ls1088a,ls208xa),
otherwise RCPM driver will program hardware with incorrect setting,
causing system (such as LS1028ARDB) failed to be waked by wakeup source.

Fixes: 791c88ca (“arm64: dts: ls1028a: Add ftm_alarm0 DT node”)
Fixes: f4fe3a86 (“arm64: dts: layerscape: add ftm_alarm0 node”)
Signed-off-by: Biwen Li <biwen.li@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Acked-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -1012,6 +1012,7 @@ rcpm: power-controller@1e34040 {
 			compatible = "fsl,ls1028a-rcpm", "fsl,qoriq-rcpm-2.1+";
 			reg = <0x0 0x1e34040 0x0 0x1c>;
 			#fsl,rcpm-wakeup-cells = <7>;
+			little-endian;
 		};
 
 		ftm_alarm0: timer@2800000 {

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

@@ -805,6 +805,7 @@ rcpm: power-controller@1e34040 {
 			compatible = "fsl,ls1088a-rcpm", "fsl,qoriq-rcpm-2.1+";
 			reg = <0x0 0x1e34040 0x0 0x18>;
 			#fsl,rcpm-wakeup-cells = <6>;
+			little-endian;
 		};
 
 		ftm_alarm0: timer@2800000 {

arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi

@@ -892,6 +892,7 @@ rcpm: power-controller@1e34040 {
 			compatible = "fsl,ls208xa-rcpm", "fsl,qoriq-rcpm-2.1+";
 			reg = <0x0 0x1e34040 0x0 0x18>;
 			#fsl,rcpm-wakeup-cells = <6>;
+			little-endian;
 		};
 
 		ftm_alarm0: timer@2800000 {