ASoC: sun50i-dmic: dt-bindings: add DT bindings for DMIC controller

DT binding documentation for this new ASoC driver.
Signed-off-by: Ban Tao <fengzheng923@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/1662966333-18000-1-git-send-email-fengzheng923@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/allwinner,sun50i-h6-dmic.yaml

+# SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/allwinner,sun50i-h6-dmic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner H6 DMIC
+
+maintainers:
+  - Ban Tao <fengzheng923@gmail.com>
+
+properties:
+  compatible:
+    const: allwinner,sun50i-h6-dmic
+
+  "#sound-dai-cells":
+    const: 0
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Bus Clock
+      - description: Module Clock
+
+  clock-names:
+    items:
+      - const: bus
+      - const: mod
+
+  dmas:
+    items:
+      - description: RX DMA Channel
+
+  dma-names:
+    items:
+      - const: rx
+
+  resets:
+    maxItems: 1
+
+required:
+  - "#sound-dai-cells"
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - dmas
+  - dma-names
+  - resets
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    #include <dt-bindings/clock/sun50i-h6-ccu.h>
+    #include <dt-bindings/reset/sun50i-h6-ccu.h>
+
+    dmic: dmic@5095000 {
+      #sound-dai-cells = <0>;
+      compatible = "allwinner,sun50i-h6-dmic";
+      reg = <0x05095000 0x400>;
+      interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&ccu CLK_BUS_DMIC>, <&ccu CLK_DMIC>;
+      clock-names = "bus", "mod";
+      dmas = <&dma 7>;
+      dma-names = "rx";
+      resets = <&ccu RST_BUS_DMIC>;
+    };
+
+...