dt-bindings: watchdog: brcm,kona-wdt: convert txt file to yaml

Converted txt file to yaml. No additional changes.
Signed-off-by: Nikita Bondarenko <n2h9z4@gmail.com>
Link: https://lore.kernel.org/r/20230418170341.28805-1-n2h9z4@gmail.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/watchdog/brcm,kona-wdt.txt

-Broadcom Kona Family Watchdog Timer
------------------------------------
-
-This watchdog timer is used in the following Broadcom SoCs:
-  BCM11130, BCM11140, BCM11351, BCM28145, BCM28155
-
-Required properties:
-  - compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt";
-  - reg: memory address & range
-
-Example:
-	watchdog@35002f40 {
-		compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt";
-		reg = <0x35002f40 0x6c>;
-	};

Documentation/devicetree/bindings/watchdog/brcm,kona-wdt.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/brcm,kona-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom Kona Family Watchdog Timer
+
+description: |
+  This watchdog timer is used in the following Broadcom SoCs:
+  BCM11130, BCM11140, BCM11351, BCM28145, BCM28155
+
+maintainers:
+  - Florian Fainelli <f.fainelli@gmail.com>
+  - Ray Jui <rjui@broadcom.com>
+  - Scott Branden <sbranden@broadcom.com>
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: brcm,bcm11351-wdt
+      - const: brcm,kona-wdt
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog@35002f40 {
+        compatible = "brcm,bcm11351-wdt", "brcm,kona-wdt";
+        reg = <0x35002f40 0x6c>;
+    };