[PATCH] dt-bindings: display: adi,adv75xx: Document #sound-dai-cells

[Fabio Estevam]

From: Fabio Estevam <festevam at denx.de>

When using audio from ADV7533 or ADV7535 and describing the audio
card via simple-audio-card, the '#sound-dai-cells' needs to be passed.

Document the '#sound-dai-cells' property to fix the following
dt-schema warning:

imx8mn-beacon-kit.dtb: hdmi at 3d: '#sound-dai-cells' does not match any of the regexes: 'pinctrl-[0-9]+'
	from schema $id: http://devicetree.org/schemas/display/bridge/adi,adv7533.yaml#
	
Signed-off-by: Fabio Estevam <festevam at denx.de>
---
 .../devicetree/bindings/display/bridge/adi,adv7533.yaml        | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
index 987aa83c2649..e15ae072922e 100644
--- a/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/adi,adv7533.yaml
@@ -89,6 +89,9 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [ 1, 2, 3, 4 ]
 
+  '#sound-dai-cells':
+    const: 0
+
   ports:
     description:
       The ADV7533/35 has two video ports and one audio port.
-- 
2.34.1