[PATCH v2] dt-bindings: mediatek: cec: Correct the compatibles for mt7623-mt8167

[Luca Leonardo Scorcia]

The HDMI CEC driver for both mt7623 and mt8167 is actually the same as
mt8173-cec and the mt7623n.dtsi board include file already uses mt8173-cec
compatible as a fallback, but the documentation lists them as separate
entries. Correct the binding by adding the correct fallback.

This change fixes the following dtbs_check errors:

DTC [C] arch/arm/boot/dts/mediatek/mt7623n-rfb-emmc.dtb
cec@10012000 (mediatek,mt7623-cec): compatible: ['mediatek,mt7623-cec',
  'mediatek,mt8173-cec'] is too long
DTC [C] arch/arm/boot/dts/mediatek/mt7623n-bananapi-bpi-r2.dtb
cec@10012000 (mediatek,mt7623-cec): compatible: ['mediatek,mt7623-cec',
  'mediatek,mt8173-cec'] is too long

Signed-off-by: Luca Leonardo Scorcia <l.scorcia@xxxxxxxxx>
---
Changes in v2:
* Fixed yaml indent (sorry about that, I ran checks multiple times but
  it did not show anything - I had to clean everything and run them again
  to get them to show...).
* Added details about the errors that are fixed with this patch.

Initial version: [1]

[1] https://lore.kernel.org/linux-mediatek/20260623135757.5111-1-l.scorcia@xxxxxxxxx/

 .../bindings/display/mediatek/mediatek,cec.yaml       | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,cec.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,cec.yaml
index 080cf321209e..bc288b1c6f07 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,cec.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,cec.yaml
@@ -15,10 +15,13 @@ description: |
 
 properties:
   compatible:
-    enum:
-      - mediatek,mt7623-cec
-      - mediatek,mt8167-cec
-      - mediatek,mt8173-cec
+    oneOf:
+      - const: mediatek,mt8173-cec
+      - items:
+          - enum:
+              - mediatek,mt7623-cec
+              - mediatek,mt8167-cec
+          - const: mediatek,mt8173-cec
 
   reg:
     maxItems: 1
-- 
2.43.0