dt-bindings: intel: add binding for Intel n6000

[upstream commit af657d7f40423bac0c898e0d89a3539ea0d1043a]

Add the binding string for the Agilex based Intel n6000 board.

Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
diff --git a/Documentation/devicetree/bindings/arm/intel,socfpga.yaml b/Documentation/devicetree/bindings/arm/intel,socfpga.yaml
new file mode 100644
index 0000000..61a454a
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/intel,socfpga.yaml
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/intel,socfpga.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel SoCFPGA platform device tree bindings
+
+maintainers:
+  - Dinh Nguyen <dinguyen@kernel.org>
+
+properties:
+  $nodename:
+    const: "/"
+  compatible:
+    oneOf:
+      - description: AgileX boards
+        items:
+          - enum:
+              - intel,n5x-socdk
+              - intel,socfpga-agilex-n6000
+              - intel,socfpga-agilex-socdk
+          - const: intel,socfpga-agilex
+
+additionalProperties: true
+
+...