dt-bindings: interrupt-controller: Convert cnxt,cx92755-ic to DT schema

Convert the Conexant Digicolor interrupt controller binding to schema
format. It's a straight-forward conversion of the typical interrupt
controller.

Acked-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/20250505144644.1288617-1-robh@kernel.org
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/interrupt-controller/cnxt,cx92755-ic.yaml

@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/cnxt,cx92755-ic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Conexant Digicolor Interrupt Controller
+
+maintainers:
+  - Baruch Siach <baruch@tkos.co.il>
+
+description: Conexant Digicolor Interrupt Controller
+
+properties:
+  compatible:
+    const: cnxt,cx92755-ic
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 1
+
+  syscon:
+    description: A phandle to the syscon node describing UC registers
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - '#interrupt-cells'
+  - syscon
+
+additionalProperties: false
+
+examples:
+  - |
+    interrupt-controller@f0000040 {
+        compatible = "cnxt,cx92755-ic";
+        interrupt-controller;
+        #interrupt-cells = <1>;
+        reg = <0xf0000040 0x40>;
+        syscon = <&uc_regs>;
+    };

Documentation/devicetree/bindings/interrupt-controller/digicolor-ic.txt

@@ -1,21 +0,0 @@
-Conexant Digicolor Interrupt Controller
-
-Required properties:
-
-- compatible : should be "cnxt,cx92755-ic"
-- reg : Specifies base physical address and size of the interrupt controller
-  registers (IC) area
-- interrupt-controller : Identifies the node as an interrupt controller
-- #interrupt-cells : Specifies the number of cells needed to encode an
-  interrupt source. The value shall be 1.
-- syscon: A phandle to the syscon node describing UC registers
-
-Example:
-
-	intc: interrupt-controller@f0000040 {
-		compatible = "cnxt,cx92755-ic";
-		interrupt-controller;
-		#interrupt-cells = <1>;
-		reg = <0xf0000040 0x40>;
-		syscon = <&uc_regs>;
-	};