dt-bindings: i2c: nxp,pca9541: convert to DT schema

Convert the bindings for NXP PCA9541 I2C bus master selector to DT
schema.

Reviewed-by: Conor Dooley <[e-mail]>
Acked-by: Peter Rosin <[e-mail]>
Acked-by: Andi Shyti <[e-mail]>
Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Andi Shyti <[e-mail]>

Documentation/devicetree/bindings/i2c/nxp,pca9541.txt

···
-* NXP PCA9541 I2C bus master selector
-
-Required Properties:
-
-  - compatible: Must be "nxp,pca9541"
-
-  - reg: The I2C address of the device.
-
-  The following required properties are defined externally:
-
-  - I2C arbitration bus node. See i2c-arb.txt in this directory.
-
-
-Example:
-
-	i2c-arbitrator@74 {
-		compatible = "nxp,pca9541";
-		reg = <0x74>;
-
-		i2c-arb {
-			#address-cells = <1>;
-			#size-cells = <0>;
-
-			eeprom@54 {
-				compatible = "atmel,24c08";
-				reg = <0x54>;
-			};
-		};
-	};

Documentation/devicetree/bindings/i2c/nxp,pca9541.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/nxp,pca9541.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP PCA9541 I2C bus master selector
+
+maintainers:
+  - Peter Rosin <[e-mail]>
+
+properties:
+  compatible:
+    const: nxp,pca9541
+
+  reg:
+    maxItems: 1
+
+  i2c-arb:
+    type: object
+    $ref: /schemas/i2c/i2c-controller.yaml
+    unevaluatedProperties: false
+    description:
+      I2C arbitration bus node.
+
+required:
+  - compatible
+  - reg
+  - i2c-arb
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        i2c-arbitrator@74 {
+            compatible = "nxp,pca9541";
+            reg = <0x74>;
+
+            i2c-arb {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                eeprom@54 {
+                    compatible = "atmel,24c08";
+                    reg = <0x54>;
+                };
+            };
+        };
+    };