dt-bindings: fpga: stratix10: Convert to json-schema

Convert intel,stratix10-soc fpga manager devicetree
binding file from freeform format to json-schema.

Reviewed-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Mahesh Rao <[e-mail]>
Signed-off-by: Dinh Nguyen <[e-mail]>

Documentation/devicetree/bindings/fpga/intel,stratix10-soc-fpga-mgr.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/fpga/intel,stratix10-soc-fpga-mgr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel Stratix10 SoC FPGA Manager
+
+maintainers:
+  - Mahesh Rao <[e-mail]>
+  - Adrian Ng Ho Yin <[e-mail]>
+  - Niravkumar L Rabara <[e-mail]>
+
+description:
+  The Intel Stratix10 SoC consists of a 64-bit quad-core ARM Cortex A53 hard
+  processor system (HPS) and a Secure Device Manager (SDM). The Stratix10
+  SoC FPGA Manager driver is used to configure/reconfigure the FPGA fabric
+  on the die.The driver communicates with SDM/ATF via the stratix10-svc
+  platform driver for performing its operations.
+
+properties:
+  compatible:
+    enum:
+      - intel,stratix10-soc-fpga-mgr
+      - intel,agilex-soc-fpga-mgr
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    fpga-mgr {
+      compatible = "intel,stratix10-soc-fpga-mgr";
+    };

Documentation/devicetree/bindings/fpga/intel-stratix10-soc-fpga-mgr.txt

···
-Intel Stratix10 SoC FPGA Manager
-
-Required properties:
-The fpga_mgr node has the following mandatory property, must be located under
-firmware/svc node.
-
-- compatible : should contain "intel,stratix10-soc-fpga-mgr" or
-	       "intel,agilex-soc-fpga-mgr"
-
-Example:
-
-	firmware {
-		svc {
-			fpga_mgr: fpga-mgr {
-				compatible = "intel,stratix10-soc-fpga-mgr";
-			};
-		};
-	};