arch: arm: dts: fsl-lx2160a.dtsi: sync serial nodes with Linux

Sync the serial nodes of the LX2160A based boards with their
representation in Linux. We also imported the clockgen and sysclk nodes
which are dependencies.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/arm/dts/fsl-lx2160a-qds.dtsi b/arch/arm/dts/fsl-lx2160a-qds.dtsi
index 6635c52..e96605b 100644
--- a/arch/arm/dts/fsl-lx2160a-qds.dtsi
+++ b/arch/arm/dts/fsl-lx2160a-qds.dtsi
@@ -2,7 +2,7 @@
 /*
  * NXP LX2160AQDS common device tree source
  *
- * Copyright 2018-2020 NXP
+ * Copyright 2018-2020, 2023 NXP
  *
  */
 
@@ -11,6 +11,7 @@
 / {
 	aliases {
 		spi0 = &fspi;
+		serial0 = &uart0;
 	};
 };
 
@@ -286,3 +287,11 @@
 &sata3 {
 	status = "okay";
 };
+
+&uart0 {
+	status = "okay";
+};
+
+&uart1 {
+	status = "okay";
+};