ASoC: rt5682: Add DAI clock binding info for WCLK/BCLK CCF usage

This patch describes that rt5682 can expose WCLK and BCLK clocks
and how to use.
Signed-off-by: Derek Fang <derek.fang@realtek.com>
Link: https://lore.kernel.org/r/1582033912-6841-2-git-send-email-derek.fang@realtek.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rt5682.txt

@@ -32,6 +32,12 @@ Optional properties:
   The delay time is realtek,btndet-delay value multiple of 8.192 ms.
   If absent, the default is 16.
 
+- #clock-cells : Should be set to '<1>',  wclk and bclk sources provided.
+- clock-output-names : Name given for DAI clocks output.
+
+- clocks : phandle and clock specifier for codec MCLK.
+- clock-names : Clock name string for 'clocks' attribute, should be "mclk".
+
 Pins on the device (for linking into audio routes) for RT5682:
 
   * DMIC L1
@@ -53,4 +59,10 @@ rt5682 {
 	realtek,dmic1-clk-pin = <1>;
 	realtek,jd-src = <1>;
 	realtek,btndet-delay = <16>;
+
+	#clock-cells = <1>;
+	clock-output-names = "rt5682-dai-wclk", "rt5682-dai-bclk";
+
+	clocks = <&osc>;
+	clock-names = "mclk";
 };