dt-bindings: display: mediatek: aal: add compatible for MT8195

Add a compatible string for the AAL block in MediaTek MT8195 that
is controlled by MDP3.
Signed-off-by: Moudy Ho <moudy.ho@mediatek.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

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

@@ -24,6 +24,7 @@ properties:
       - enum:
           - mediatek,mt8173-disp-aal
           - mediatek,mt8183-disp-aal
+          - mediatek,mt8195-mdp3-aal
       - items:
           - enum:
               - mediatek,mt2712-disp-aal