dt-bindings: watchdog: cnxt,cx92755-wdt: convert txt to yaml

Convert txt file to yaml.
Add maintainers list.
Signed-off-by: Nik Bune <n2h9z4@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231023202622.18558-1-n2h9z4@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/watchdog/cnxt,cx92755-wdt.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/cnxt,cx92755-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Conexant Digicolor SoCs Watchdog timer
+
+description: |
+  The watchdog functionality in Conexant Digicolor SoCs relies on the so called
+  "Agent Communication" block. This block includes the eight programmable system
+  timer counters. The first timer (called "Timer A") is the only one that can be
+  used as watchdog.
+
+allOf:
+  - $ref: watchdog.yaml#
+
+maintainers:
+  - Baruch Siach <baruch@tkos.co.il>
+
+properties:
+  compatible:
+    const: cnxt,cx92755-wdt
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog@f0000fc0 {
+        compatible = "cnxt,cx92755-wdt";
+        reg = <0xf0000fc0 0x8>;
+        clocks = <&main_clk>;
+        timeout-sec = <15>;
+    };

Documentation/devicetree/bindings/watchdog/digicolor-wdt.txt

-Conexant Digicolor SoCs Watchdog timer
-
-The watchdog functionality in Conexant Digicolor SoCs relies on the so called
-"Agent Communication" block. This block includes the eight programmable system
-timer counters. The first timer (called "Timer A") is the only one that can be
-used as watchdog.
-
-Required properties:
-
-- compatible : Should be "cnxt,cx92755-wdt"
-- reg : Specifies base physical address and size of the registers
-- clocks : phandle; specifies the clock that drives the timer
-
-Optional properties:
-
-- timeout-sec : Contains the watchdog timeout in seconds
-
-Example:
-
-	watchdog@f0000fc0 {
-		compatible = "cnxt,cx92755-wdt";
-		reg = <0xf0000fc0 0x8>;
-		clocks = <&main_clk>;
-		timeout-sec = <15>;
-	};