dt-bindings: watchdog: microchip,pic32mzda-dmt: Convert to DT schema

Convert Microchip PIC32 Deadman Timer devicetree binding
from legacy text format to DT schema.

Signed-off-by: Udaya Kiran Challa <challauday369@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260701171917.263050-1-challauday369@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/watchdog/microchip,pic32-dmt.txt

@@ -1,19 +0,0 @@
-* Microchip PIC32 Deadman Timer
-
-The deadman timer is used to reset the processor in the event of a software
-malfunction. It is a free-running instruction fetch timer, which is clocked
-whenever an instruction fetch occurs until a count match occurs.
-
-Required properties:
-- compatible: must be "microchip,pic32mzda-dmt".
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- clocks: phandle of source clk. Should be <&rootclk PB7CLK>.
-
-Example:
-
-	watchdog@1f800a00 {
-		compatible = "microchip,pic32mzda-dmt";
-		reg = <0x1f800a00 0x80>;
-		clocks = <&rootclk PB7CLK>;
-	};

Documentation/devicetree/bindings/watchdog/microchip,pic32mzda-dmt.yaml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/microchip,pic32mzda-dmt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip PIC32MZDA Deadman Timer
+
+maintainers:
+  - Thomas Bogendoerfer <tsbogend@alpha.franken.de>
+
+description: |
+  The deadman timer is used to reset the processor in the event of a software
+  malfunction. It is a free-running instruction fetch timer, which is clocked
+  whenever an instruction fetch occurs until a count match occurs.
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    const: microchip,pic32mzda-dmt
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/microchip,pic32-clock.h>
+
+    watchdog@1f800a00 {
+        compatible = "microchip,pic32mzda-dmt";
+        reg = <0x1f800a00 0x80>;
+        clocks = <&rootclk PB7CLK>;
+       };