ARM: dts: Add support for two more Kontron evalkit boards 'N6311 S' and 'N6411 S'

The 'N6311 S' and the 'N6411 S' are similar to the Kontron 'N6310 S'
evaluation kit boards. Instead of the N6310 SoM, they feature a N6311
or N6411 SoM.

Signed-off-by: Frieder Schrempf <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6ul-kontron-n6311-s.dts

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017 exceet electronics GmbH
+ * Copyright (C) 2018 Kontron Electronics GmbH
+ */
+
+/dts-v1/;
+
+#include "imx6ul-kontron-n6311-som.dtsi"
+#include "imx6ul-kontron-n6x1x-s.dtsi"
+
+/ {
+	model = "Kontron N6311 S";
+	compatible = "kontron,imx6ul-n6311-s", "kontron,imx6ul-n6311-som",
+		     "fsl,imx6ul";
+};

arch/arm/boot/dts/imx6ull-kontron-n6411-s.dts

···
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2017 exceet electronics GmbH
+ * Copyright (C) 2019 Kontron Electronics GmbH
+ */
+
+/dts-v1/;
+
+#include "imx6ull-kontron-n6411-som.dtsi"
+#include "imx6ul-kontron-n6x1x-s.dtsi"
+
+/ {
+	model = "Kontron N6411 S";
+	compatible = "kontron,imx6ull-n6411-s", "kontron,imx6ull-n6411-som",
+		     "fsl,imx6ull";
+};