dt-bindings: arm: Convert NXP LPC32xx board/soc bindings to json-schema

Convert NXP LPC32xx SoC bindings to DT schema format using json-schema.

Cc: Roland Stigge <stigge@antcom.de>
Signed-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/nxp/lpc32xx.txt

-NXP LPC32xx Platforms Device Tree Bindings
-------------------------------------------
-
-Boards with the NXP LPC32xx SoC shall have the following properties:
-
-Required root node property:
-
-compatible: must be "nxp,lpc3220", "nxp,lpc3230", "nxp,lpc3240" or "nxp,lpc3250"

Documentation/devicetree/bindings/arm/nxp/lpc32xx.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/nxp/lpc32xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP LPC32xx Platforms Device Tree Bindings
+
+maintainers:
+  - Roland Stigge <stigge@antcom.de>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - nxp,lpc3220
+          - nxp,lpc3230
+          - nxp,lpc3240
+      - items:
+        - enum:
+            - ea,ea3250
+            - phytec,phy3250
+        - const: nxp,lpc3250
+
+...