dt-bindings: Add Arm corstone1000 platform

Add bindings to describe the FPGA in a prototyping board
(MPS3) implementation and the Fixed Virtual Platform
implementation of the ARM Corstone1000 platform.

Link: https://lore.kernel.org/r/20220408131922.3864348-2-rui.silva@linaro.org
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Documentation/devicetree/bindings/arm/arm,corstone1000.yaml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/arm,corstone1000.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Corstone1000 Device Tree Bindings
+
+maintainers:
+  - Vishnu Banavath <vishnu.banavath@arm.com>
+  - Rui Miguel Silva <rui.silva@linaro.org>
+
+description: |+
+  ARM's Corstone1000 includes pre-verified Corstone SSE-710 subsystem that
+  provides a flexible compute architecture that combines Cortex‑A and Cortex‑M
+  processors.
+
+  Support for Cortex‑A32, Cortex‑A35 and Cortex‑A53 processors. Two expansion
+  systems for M-Class (or other) processors for adding sensors, connectivity,
+  video, audio and machine learning at the edge System and security IPs to build
+  a secure SoC for a range of rich IoT applications, for example gateways, smart
+  cameras and embedded systems.
+
+  Integrated Secure Enclave providing hardware Root of Trust and supporting
+  seamless integration of the optional CryptoCell™-312 cryptographic
+  accelerator.
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: Corstone1000 MPS3 it has 1 Cortex-A35 CPU core in a FPGA
+          implementation of the Corstone1000 in the MPS3 prototyping board. See
+          ARM document DAI0550.
+        items:
+          - const: arm,corstone1000-mps3
+      - description: Corstone1000 FVP is the Fixed Virtual Platform
+          implementation of this system. See ARM ecosystems FVP's.
+        items:
+          - const: arm,corstone1000-fvp
+
+additionalProperties: true
+
+...