armv8: dts: lx2160aqds : Add pcf2127 node

Add the pcf2127-rtc node under the i2c0->i2c-mux@77->i2c@3 in dts for
lx2160aqds boards.
Signed-off-by: NChuanhua Han <chuanhua.han@nxp.com>
Reviewed-by: NPrabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

arch/arm/dts/fsl-lx2160a-qds.dts

@@ -23,6 +23,29 @@
 	status = "okay";
 };
 
+&i2c0 {
+	status = "okay";
+	u-boot,dm-pre-reloc;
+
+	i2c-mux@77 {
+		compatible = "nxp,pca9547";
+		reg = <0x77>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		i2c@3 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x3>;
+
+			rtc@51 {
+				compatible = "pcf2127-rtc";
+				reg = <0x51>;
+			};
+		};
+	};
+};
+
 &sata0 {
 	status = "okay";
 };