dt-bindings: arm: sunxi: Fix incorrect '-' usage

Commit 6bc6bf8a ("dt-bindings: arm: sunxi: document Anbernic RG35XX
handheld gaming device variants") mistakenly added '-' on each line
which created empty (i.e. description only) schemas matching anything.
This causes validation to fail on all the root node compatibles as
there are multiple oneOf clauses passing.

Fixes: 6bc6bf8a ("dt-bindings: arm: sunxi: document Anbernic RG35XX handheld gaming device variants")
Reviewed-by: Ryan Walklin <ryan@testtoast.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240503154402.967632-1-robh@kernel.orgSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

Documentation/devicetree/bindings/arm/sunxi.yaml

@@ -57,17 +57,17 @@ properties:
           - const: allwinner,sun8i-v3s
 
       - description: Anbernic RG35XX (2024)
-      - items:
+        items:
           - const: anbernic,rg35xx-2024
           - const: allwinner,sun50i-h700
 
       - description: Anbernic RG35XX Plus
-      - items:
+        items:
           - const: anbernic,rg35xx-plus
           - const: allwinner,sun50i-h700
 
       - description: Anbernic RG35XX H
-      - items:
+        items:
           - const: anbernic,rg35xx-h
           - const: allwinner,sun50i-h700