dt-bindings: rtc: Convert imxdi rtc to json-schema

Convert the i.MXDI RTC binding to DT schema format using json-schema
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/rtc/imxdi-rtc.txt

-* i.MX25 Real Time Clock controller
-
-Required properties:
-- compatible: should be: "fsl,imx25-rtc"
-- reg: physical base address of the controller and length of memory mapped
-  region.
-- clocks: should contain the phandle for the rtc clock
-- interrupts: rtc alarm interrupt
-
-Optional properties:
-- interrupts: dryice security violation interrupt (second entry)
-
-Example:
-
-rtc@53ffc000 {
-	compatible = "fsl,imx25-rtc";
-	reg = <0x53ffc000 0x4000>;
-	clocks = <&clks 81>;
-	interrupts = <25 56>;
-};

Documentation/devicetree/bindings/rtc/imxdi-rtc.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rtc/imxdi-rtc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX25 Real Time Clock controller
+
+maintainers:
+  - Roland Stigge <stigge@antcom.de>
+
+properties:
+  compatible:
+    const: fsl,imx25-rtc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: rtc alarm interrupt
+      - description: dryice security violation interrupt
+    minItems: 1
+    maxItems: 2
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    rtc@53ffc000 {
+        compatible = "fsl,imx25-rtc";
+        reg = <0x53ffc000 0x4000>;
+        clocks = <&clks 81>;
+        interrupts = <25>, <56>;
+    };