dt-bindings: display: mediatek: clean unnecessary item

The item which have the mediatek,mt8192-disp-ccorr as const compatible
already exist above. Merge all compatibles which have the same fallback
under the same item.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20230306-ccorr-binding-fix-v5-0-6c56aaecc3b1@baylibre.com/Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Documentation/devicetree/bindings/display/mediatek/mediatek,ccorr.yaml

@@ -27,13 +27,10 @@ properties:
           - const: mediatek,mt8192-disp-ccorr
       - items:
           - enum:
+              - mediatek,mt8186-disp-ccorr
               - mediatek,mt8188-disp-ccorr
               - mediatek,mt8195-disp-ccorr
           - const: mediatek,mt8192-disp-ccorr
-      - items:
-          - enum:
-              - mediatek,mt8186-disp-ccorr
-          - const: mediatek,mt8192-disp-ccorr
 
   reg:
     maxItems: 1