dt-bindings: arm: firmware: tlm,trusted-foundations: Convert txt bindings to yaml

Convert Trusted Foundation binding to the YAML syntax.
Signed-off-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20211022232100.137067-1-david@ixit.czSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/arm/firmware/tlm,trusted-foundations.txt

-Trusted Foundations
--------------------
-
-Boards that use the Trusted Foundations secure monitor can signal its
-presence by declaring a node compatible with "tlm,trusted-foundations"
-under the /firmware/ node
-
-Required properties:
-- compatible: "tlm,trusted-foundations"
-- tlm,version-major: major version number of Trusted Foundations firmware
-- tlm,version-minor: minor version number of Trusted Foundations firmware
-
-Example:
-	firmware {
-		trusted-foundations {
-			compatible = "tlm,trusted-foundations";
-			tlm,version-major = <2>;
-			tlm,version-minor = <8>;
-		};
-	};

Documentation/devicetree/bindings/arm/firmware/tlm,trusted-foundations.yaml

+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/arm/firmware/tlm,trusted-foundations.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Trusted Foundations
+
+description: |
+  Boards that use the Trusted Foundations secure monitor can signal its
+  presence by declaring a node compatible under the /firmware/ node
+
+maintainers:
+  - Stephen Warren <swarren@nvidia.com>
+
+properties:
+  $nodename:
+    const: trusted-foundations
+
+  compatible:
+    const: tlm,trusted-foundations
+
+  tlm,version-major:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: major version number of Trusted Foundations firmware
+
+  tlm,version-minor:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: minor version number of Trusted Foundations firmware
+
+required:
+  - compatible
+  - tlm,version-major
+  - tlm,version-minor
+
+additionalProperties: false
+
+examples:
+  - |
+    firmware {
+      trusted-foundations {
+        compatible = "tlm,trusted-foundations";
+        tlm,version-major = <2>;
+        tlm,version-minor = <8>;
+      };
+    };