dt-bindings: fsl: Convert i.MX7ULP SIM to json-schema

Convert the i.MX7ULP SIM binding to DT schema format using json-schema.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Link: https://lore.kernel.org/r/1596595841-27563-2-git-send-email-Anson.Huang@nxp.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-sim.txt

-Freescale i.MX7ULP System Integration Module
-----------------------------------------------
-The system integration module (SIM) provides system control and chip configuration
-registers. In this module, chip revision information is located in JTAG ID register,
-and a set of registers have been made available in DGO domain for SW use, with the
-objective to maintain its value between system resets.
-
-Required properties:
-- compatible:	Should be "fsl,imx7ulp-sim".
-- reg:		Specifies base physical address and size of the register sets.
-
-Example:
-sim: sim@410a3000 {
-	compatible = "fsl,imx7ulp-sim", "syscon";
-	reg = <0x410a3000 0x1000>;
-};

Documentation/devicetree/bindings/arm/freescale/fsl,imx7ulp-sim.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/freescale/fsl,imx7ulp-sim.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX7ULP System Integration Module
+
+maintainers:
+  - Anson Huang <anson.huang@nxp.com>
+
+description: |
+  The system integration module (SIM) provides system control and chip configuration
+  registers. In this module, chip revision information is located in JTAG ID register,
+  and a set of registers have been made available in DGO domain for SW use, with the
+  objective to maintain its value between system resets.
+
+properties:
+  compatible:
+    items:
+      - const: fsl,imx7ulp-sim
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    sim@410a3000 {
+        compatible = "fsl,imx7ulp-sim", "syscon";
+        reg = <0x410a3000 0x1000>;
+    };