powerpc: dts: t1042d4rdb: add serial nodes

Add the serial node descriptions similar to Linux v6.4 for the
t1042d4rdb board and its dependencies.

Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/arch/powerpc/dts/t1042si-post.dtsi b/arch/powerpc/dts/t1042si-post.dtsi
index eebbbaf..9f4fd72 100644
--- a/arch/powerpc/dts/t1042si-post.dtsi
+++ b/arch/powerpc/dts/t1042si-post.dtsi
@@ -3,11 +3,13 @@
  * T1042 Silicon/SoC Device Tree Source (post include)
  *
  * Copyright 2013 - 2014 Freescale Semiconductor Inc.
- * Copyright 2021 NXP
+ * Copyright 2021-2023 NXP
  *
  */
 &soc {
 /include/ "qoriq-clockgen2.dtsi"
+/include/ "qoriq-duart-0.dtsi"
+/include/ "qoriq-duart-1.dtsi"
 /include/ "qoriq-gpio-0.dtsi"
 /include/ "qoriq-gpio-1.dtsi"
 /include/ "qoriq-gpio-2.dtsi"