ASoC: dt-bindings: rt5659: Update binding doc

Update following in rt5659.txt binding doc
  - Add JD source for Intel HDA header: Commit 041e74b714
    ("ASoC: rt5659: Add the support of Intel HDA Header")
    added driver support. Add missing info here.

  - sound-name-prefix: Used to prefix component widgets/kcontrols
    with given prefix.

  - ports: Helps to use the Codec with audio graph card

Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Cc: Oder Chiou <oder_chiou@realtek.com>
Cc: Bard Liao <bardliao@realtek.com>
Link: https://lore.kernel.org/r/1611944866-29373-2-git-send-email-spujar@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/rt5659.txt

@@ -37,10 +37,21 @@ Optional properties:
 - realtek,jd-src
   0: No JD is used
   1: using JD3 as JD source
+  2: JD source for Intel HDA header
 
 - realtek,ldo1-en-gpios : The GPIO that controls the CODEC's LDO1_EN pin.
 - realtek,reset-gpios : The GPIO that controls the CODEC's RESET pin.
 
+- sound-name-prefix: Please refer to name-prefix.txt
+
+- ports: A Codec may have a single or multiple I2S interfaces. These
+  interfaces on Codec side can be described under 'ports' or 'port'.
+  When the SoC or host device is connected to multiple interfaces of
+  the Codec, the connectivity can be described using 'ports' property.
+  If a single interface is used, then 'port' can be used. The usage
+  depends on the platform or board design.
+  Please refer to Documentation/devicetree/bindings/graph.txt
+
 Pins on the device (for linking into audio routes) for RT5659/RT5658:
 
   * DMIC L1