dt-bindings: rng: mediatek: convert to yaml schema

Convert the RNG binding for MediaTek to use YAML schema.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Link: https://lore.kernel.org/r/20210520111656.66017-1-fparent@baylibre.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/rng/mtk-rng.txt

-Device-Tree bindings for Mediatek random number generator
-found in MediaTek SoC family
-
-Required properties:
-- compatible	    : Should be
-			"mediatek,mt7622-rng", 	"mediatek,mt7623-rng" : for MT7622
-			"mediatek,mt7629-rng",  "mediatek,mt7623-rng" : for MT7629
-			"mediatek,mt7623-rng" : for MT7623
-			"mediatek,mt8516-rng", "mediatek,mt7623-rng" : for MT8516
-- clocks	    : list of clock specifiers, corresponding to
-		      entries in clock-names property;
-- clock-names	    : Should contain "rng" entries;
-- reg 		    : Specifies base physical address and size of the registers
-
-Example:
-
-rng: rng@1020f000 {
-	compatible = "mediatek,mt7623-rng";
-	reg = <0 0x1020f000 0 0x1000>;
-	clocks = <&infracfg CLK_INFRA_TRNG>;
-	clock-names = "rng";
-};

Documentation/devicetree/bindings/rng/mtk-rng.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/rng/mtk-rng.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: MediaTek Random number generator
+
+maintainers:
+  - Sean Wang <sean.wang@mediatek.com>
+
+properties:
+  $nodename:
+    pattern: "^rng@[0-9a-f]+$"
+
+  compatible:
+    oneOf:
+      - enum:
+          - mediatek,mt7623-rng
+      - items:
+          - enum:
+              - mediatek,mt7622-rng
+              - mediatek,mt7629-rng
+              - mediatek,mt8516-rng
+          - const: mediatek,mt7623-rng
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    items:
+      - const: rng
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt2701-clk.h>
+    rng: rng@1020f000 {
+            compatible = "mediatek,mt7623-rng";
+            reg = <0x1020f000 0x1000>;
+            clocks = <&infracfg CLK_INFRA_TRNG>;
+            clock-names = "rng";
+    };