[PATCH v2 3/3] dt-bindings: display: rockchip,dw-hdmi: Fix sound-dai-cells warning

[Jonas Karlman <jonas@kwiboo.se>]

The rockchip,dw-hdmi node can be used as a sound dai codec, however,
dtbs_check may report the following issue:

  hdmi@fe0a0000: Unevaluated properties are not allowed ('#sound-dai-cells' was unexpected)
  from schema $id: http://devicetree.org/schemas/display/rockchip/rockchip,dw-hdmi.yaml#

Add a reference to dai-common.yaml and add the #sound-dai-cells prop to
resolve this warning.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
v2: New patch to fix #sound-dai-cells warning
---
 .../bindings/display/rockchip/rockchip,dw-hdmi.yaml           | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
index af638b6c0d21..3285fff54416 100644
--- a/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
+++ b/Documentation/devicetree/bindings/display/rockchip/rockchip,dw-hdmi.yaml
@@ -15,6 +15,7 @@ description: |
 
 allOf:
   - $ref: ../bridge/synopsys,dw-hdmi.yaml#
+  - $ref: /schemas/sound/dai-common.yaml#
 
 properties:
   compatible:
@@ -124,6 +125,9 @@ properties:
     description:
       phandle to the GRF to mux vopl/vopb.
 
+  "#sound-dai-cells":
+    const: 0
+
 required:
   - compatible
   - reg
-- 
2.43.2