[E81][B79][DTB] Add devicetree include file for B79 baseboard

arch/arm64/boot/dts/seco/include/qcs6490-e81-b79.dtsi

+/*****************************************************************************/
+/* SPDX-License-Identifier: (GPL-2.0+ OR MIT)                                */
+/*
+ * Device-tree-include-file for SECO B79 baseboard
+ *
+ * Copyright 2024 SECO    Dietmar Muscholik <dietmar.muscholik@seco.com>
+ *
+ *
+ *****************************************************************************/
+
+#ifndef SECO_B79_DTSI
+#define SECO_B79_DTSI
+
+/ {
+	reg_1v8: 1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "1V8";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+	};
+
+	reg_1v8_s: 1v8_s {
+		compatible = "regulator-fixed";
+		regulator-name = "1V8_S";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-always-on;
+	};
+
+	reg_3v3: 3v3 {
+		compatible = "regulator-fixed";
+		regulator-name = "3V3";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	reg_3v3_s: 3v3_s {
+		compatible = "regulator-fixed";
+		regulator-name = "3V3_S";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+	};
+
+	reg_5v_s: 5v_s {
+		compatible = "regulator-fixed";
+		regulator-name = "5V_S";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+
+	reg_12v_s: 12v_s {
+		compatible = "regulator-fixed";
+		regulator-name = "12V_S";
+		regulator-min-microvolt = <12000000>;
+		regulator-max-microvolt = <12000000>;
+		regulator-always-on;
+	};
+
+	reg_3v3_aud: 3v3_aud {
+		compatible = "regulator-fixed";
+		regulator-name = "3V3_AUD";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&reg_3v3_s>;
+		regulator-always-on;
+	};
+
+};
+
+#endif