dt-bindings: watchdog: qca,ar7130-wdt: convert txt to yaml

Convert txt file to yaml. Add maintainers from git blame.
Drop qca,ar9330-wdt from example of compatible property
and leave only qca,ar7130-wdt, as description of property
mentioned must be qca,ar7130-wdt.
Signed-off-by: Nik Bune <n2h9z4@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Link: https://lore.kernel.org/r/20231102123234.62350-1-n2h9z4@gmail.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Documentation/devicetree/bindings/watchdog/qca,ar7130-wdt.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/qca,ar7130-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Atheros AR7130 Watchdog Timer (WDT) Controller
+
+maintainers:
+  - Gabor Juhos <juhosg@openwrt.org>
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    const: qca,ar7130-wdt
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog@18060008 {
+        compatible = "qca,ar7130-wdt";
+        reg = <0x18060008 0x8>;
+    };

Documentation/devicetree/bindings/watchdog/qca-ar7130-wdt.txt

-* Qualcomm Atheros AR7130 Watchdog Timer (WDT) Controller
-
-Required properties:
-- compatible: must be "qca,ar7130-wdt"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-
-Example:
-
-wdt@18060008 {
-	compatible = "qca,ar9330-wdt", "qca,ar7130-wdt";
-	reg = <0x18060008 0x8>;
-};