dt-bindings: watchdog: nxp,lpc1850-wdt: Convert bindings to dtschema

Convert the NXP LPC18xx Watchdog Timer bindings to yaml format.

Cc: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Animesh Agarwal <animeshagarwal28@gmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240814061210.56213-1-animeshagarwal28@gmail.comSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/watchdog/lpc18xx-wdt.txt

-* NXP LPC18xx Watchdog Timer (WDT)
-
-Required properties:
-- compatible: Should be "nxp,lpc1850-wwdt"
-- reg: Should contain WDT registers location and length
-- clocks: Must contain an entry for each entry in clock-names.
-- clock-names: Should contain "wdtclk" and "reg"; the watchdog counter
-               clock and register interface clock respectively.
-- interrupts: Should contain WDT interrupt
-
-Examples:
-
-watchdog@40080000 {
-	compatible = "nxp,lpc1850-wwdt";
-	reg = <0x40080000 0x24>;
-	clocks = <&cgu BASE_SAFE_CLK>, <&ccu1 CLK_CPU_WWDT>;
-	clock-names = "wdtclk", "reg";
-	interrupts = <49>;
-};

Documentation/devicetree/bindings/watchdog/nxp,lpc1850-wwdt.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/nxp,lpc1850-wwdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP LPC18xx Watchdog Timer (WDT)
+
+maintainers:
+  - Animesh Agarwal <animeshagarwal28@gmail.com>
+
+properties:
+  compatible:
+    const: nxp,lpc1850-wwdt
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Watchdog counter clock
+      - description: Register interface clock
+
+  clock-names:
+    items:
+      - const: wdtclk
+      - const: reg
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/lpc18xx-cgu.h>
+    #include <dt-bindings/clock/lpc18xx-ccu.h>
+
+    watchdog@40080000 {
+        compatible = "nxp,lpc1850-wwdt";
+        reg = <0x40080000 0x24>;
+        clocks = <&cgu BASE_SAFE_CLK>, <&ccu1 CLK_CPU_WWDT>;
+        clock-names = "wdtclk", "reg";
+        interrupts = <49>;
+    };