[E81][B79] Add device-trees for E81-modules on B79-boards with eDP-displays

This also introduces a more logical naming convention:
seco-<soc>-<som>-<baseboard>-<display>.dts

dtsi-files for baseboards are prefixed with "baseboard-" and those for
displays with "display-".

arch/arm64/boot/dts/seco/seco-qcs5430-fp1-e81-b79-edp.dts

+/*****************************************************************************/
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT)                                */
+/*
+ * Device-tree-file for SECO SMARC Module with QCS5430-FP1
+ *
+ * Copyright 2025 SECO NE    Dietmar Muscholik <dietmar.muscholik@seco.com>
+ *
+ *****************************************************************************/
+
+/dts-v1/;
+
+#include "include/qcs5430-fp1-e81.dtsi"
+#include "include/baseboard-e81-b79.dtsi"
+#include "include/display-e81-edp.dtsi"
+
+/ {
+	model = "SECO QCS5430-FP1-E81 SMARC module in B79 baseboard with eDP display";
+	compatible = "qcom,qcs5430-fp1-addons-rb3gen2-vision-mezz","qcom,qcs5430";
+};
+

arch/arm64/boot/dts/seco/seco-qcs6490-e81-b79-edp.dts

+/*****************************************************************************/
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT)                                */
+/*
+ * Device-tree-file for SECO SMARC Module with QCS5430-FP1
+ *
+ * Copyright 2025 SECO NE    Dietmar Muscholik <dietmar.muscholik@seco.com>
+ *
+ *****************************************************************************/
+
+/dts-v1/;
+
+#include "include/qcs6490-e81.dtsi"
+#include "include/baseboard-e81-b79.dtsi"
+#include "include/display-e81-edp.dtsi"
+
+/ {
+	model = "SECO QCS64930-E81 SMARC module in B79 baseboard with eDP display";
+	compatible = "qcom,qcs6490-addons-rb3gen2-video-mezz", "qcom,qcm6490";
+};
+