dt-bindings: serial: mediatek,uart: add MT6572

Add a compatible string for serial on the MT6572 SoC.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Max Shevchenko <wctrl@proton.me>
Link: https://lore.kernel.org/r/20250701-mt6572-v3-1-8937cfa33f95@proton.me
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Max Shevchenko

Documentation/devicetree/bindings/serial/mediatek,uart.yaml

@@ -25,6 +25,7 @@ properties:
           - enum:
               - mediatek,mt2701-uart
               - mediatek,mt2712-uart
+              - mediatek,mt6572-uart
               - mediatek,mt6580-uart
               - mediatek,mt6582-uart
               - mediatek,mt6589-uart