dt-bindings: clock: Add binding documentation for TI Audio REFCLK

Add DT bindings for TI's audio reference clocks (REFCLK) present on AM62
SoC.
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jai Luthra <j-luthra@ti.com>
Link: https://lore.kernel.org/r/20230515-refclk-v3-1-37c0b550f406@ti.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/clock/ti,am62-audio-refclk.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/ti,am62-audio-refclk.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI Audio Reference Clock
+
+maintainers:
+  - Jai Luthra <j-luthra@ti.com>
+
+properties:
+  compatible:
+    items:
+      - const: ti,am62-audio-refclk
+
+  reg:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 0
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - "#clock-cells"
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    audio_refclk0: clock@82e0 {
+        compatible = "ti,am62-audio-refclk";
+        reg = <0x82e0 0x4>;
+        clocks = <&k3_clks 157 0>;
+        assigned-clocks = <&k3_clks 157 0>;
+        assigned-clock-parents = <&k3_clks 157 8>;
+        #clock-cells = <0>;
+    };