dt-bindings: gpu: mali-bifrost: Add Allwinner A523 compatible

Add a compatible for the Allwinner A523 SoC, with an integrated
ARM Mali G57 MC1 (Valhall-JM) GPU.

Signed-off-by: Mikhail Kalashnikov <iuncuim@gmail.com>
Link: https://lore.kernel.org/r/20250711035730.17507-2-iuncuim@gmail.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>

Author: iuncuim

Documentation/devicetree/bindings/gpu/arm,mali-bifrost.yaml

@@ -40,6 +40,7 @@ properties:
           - const: arm,mali-valhall-jm # Mali Valhall GPU model/revision is fully discoverable
       - items:
           - enum:
+              - allwinner,sun55i-a523-mali
               - mediatek,mt8188-mali
               - mediatek,mt8192-mali
           - const: arm,mali-valhall-jm # Mali Valhall GPU model/revision is fully discoverable