armv8: ls1046aqds: add lpuart support

LPUART0 is used by default, and it's using platform clock.

Signed-off-by: Shaohui Xie <Shaohui.Xie@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/dts/fsl-ls1046a-qds.dtsi b/arch/arm/dts/fsl-ls1046a-qds.dtsi
index c512293..a49ca08 100644
--- a/arch/arm/dts/fsl-ls1046a-qds.dtsi
+++ b/arch/arm/dts/fsl-ls1046a-qds.dtsi
@@ -75,3 +75,7 @@
 &duart1 {
 	status = "okay";
 };
+
+&lpuart0 {
+	status = "okay";
+};