dt-bindings: thermal: Add support for Airoha EN7581 thermal sensor

Add support for Airoha EN7581 thermal sensor and monitor. This is a
simple sensor for the CPU or SoC Package that provide thermal sensor and
trip point for hot low and critical condition to fire interrupt and
react on the abnormal state.

Signed-off-by: Christian Marangi <[e-mail]>
Reviewed-by: Rob Herring (Arm) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Daniel Lezcano <[e-mail]>

Documentation/devicetree/bindings/thermal/airoha,en7581-thermal.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/airoha,en7581-thermal.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha EN7581 Thermal Sensor and Monitor
+
+maintainers:
+  - Christian Marangi <[e-mail]>
+
+properties:
+  compatible:
+    const: airoha,en7581-thermal
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  airoha,chip-scu:
+    description: phandle to the chip SCU syscon
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  '#thermal-sensor-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - airoha,chip-scu
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    thermal-sensor@1efbd800 {
+        compatible = "airoha,en7581-thermal";
+        reg = <0x1efbd000 0xd5c>;
+        interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
+        airoha,chip-scu = <&chip_scu>;
+
+        #thermal-sensor-cells = <0>;
+    };