dt-bindings: rng: hisi-rng: convert to DT schema

Convert the Devicetree binding documentation for hisilicon,hip04-rng
and hisilicon,hip05-rng from plain text to YAML.

Signed-off-by: Kael D'Alcamo <dev@kael-k.io>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Author: kael-k

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

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/rng/hisi-rng.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hisilicon Random Number Generator
+
+maintainers:
+  - Kefeng Wang <wangkefeng.wang@huawei>
+
+properties:
+  compatible:
+    enum:
+      - hisilicon,hip04-rng
+      - hisilicon,hip05-rng
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    rng@d1010000 {
+      compatible = "hisilicon,hip05-rng";
+      reg = <0xd1010000 0x100>;
+    };