armv8: ls1028aqds: add lpuart dts support

Rename fsl-ls1028a-qds.dts to fsl-ls1028a-qds.dtsi so that
it can be used as common device tree for lpuart and duart.
Add lpuart device tree and duart device tree respectively
for qds which are used with duart and lpuart console.

Signed-off-by: Vabhav Sharma <vabhav.sharma@nxp.com>
Signed-off-by: Yuantian Tang <andy.tang@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/arm/dts/fsl-ls1028a-qds-duart.dts b/arch/arm/dts/fsl-ls1028a-qds-duart.dts
new file mode 100644
index 0000000..83264e0
--- /dev/null
+++ b/arch/arm/dts/fsl-ls1028a-qds-duart.dts
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Device Tree file for Freescale Layerscape-1028AQDS family SoC.
+ *
+ * Copyright 2020 NXP
+ */
+
+/dts-v1/;
+#include "fsl-ls1028a-qds.dtsi"
+
+/ {
+	chosen {
+		stdout-path = &serial0;
+	};
+};