dt-bindings: Add Keem Bay OCS AES bindings

Add device-tree bindings for Intel Keem Bay Offload and Crypto Subsystem
(OCS) AES crypto driver.
Signed-off-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
Acked-by: Mark Gross <mgross@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Documentation/devicetree/bindings/crypto/intel,keembay-ocs-aes.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/intel,keembay-ocs-aes.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel Keem Bay OCS AES Device Tree Bindings
+
+maintainers:
+  - Daniele Alessandrelli <daniele.alessandrelli@intel.com>
+
+description:
+  The Intel Keem Bay Offload and Crypto Subsystem (OCS) AES engine provides
+  hardware-accelerated AES/SM4 encryption/decryption.
+
+properties:
+  compatible:
+    const: intel,keembay-ocs-aes
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    crypto@30008000 {
+      compatible = "intel,keembay-ocs-aes";
+      reg = <0x30008000 0x1000>;
+      interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&scmi_clk 95>;
+    };