ASoC: dt-bindings: xmos,xvf3500: add XMOS XVF3500 voice processor

The XMOS XVF3500 VocalFusion Voice Processor[1] is a low-latency, 32-bit
multicore controller for voice processing.

Add new bindings to define the device properties.

[1] https://www.xmos.com/xvf3500/

Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Acked-by: Mark Brown <[e-mail]>
Signed-off-by: Javier Carrasco <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

Documentation/devicetree/bindings/sound/xmos,xvf3500.yaml

···
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/xmos,xvf3500.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: XMOS XVF3500 VocalFusion Voice Processor
+
+maintainers:
+  - Javier Carrasco <[e-mail]>
+
+description:
+  The XMOS XVF3500 VocalFusion Voice Processor is a low-latency, 32-bit
+  multicore controller for voice processing.
+  https://www.xmos.com/xvf3500/
+
+allOf:
+  - $ref: /schemas/usb/usb-device.yaml#
+
+properties:
+  compatible:
+    const: usb20b1,0013
+
+  reg: true
+
+  reset-gpios:
+    maxItems: 1
+
+  vdd-supply:
+    description:
+      Regulator for the 1V0 supply.
+
+  vddio-supply:
+    description:
+      Regulator for the 3V3 supply.
+
+required:
+  - compatible
+  - reg
+  - reset-gpios
+  - vdd-supply
+  - vddio-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    usb {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        voice_processor: voice-processor@1 {
+            compatible = "usb20b1,0013";
+            reg = <1>;
+            reset-gpios = <&gpio 5 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&vcc1v0>;
+            vddio-supply = <&vcc3v3>;
+        };
+    };
+
+...