dt-bindings: interrupt-controller: mediatek,mt6577-sysirq: add MT6572

Add a compatible string for sysirq on the MT6572 SoC.

Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Acked-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Max Shevchenko <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: AngeloGioacchino Del Regno <[e-mail]>

Documentation/devicetree/bindings/interrupt-controller/mediatek,mt6577-sysirq.yaml

···
           - enum:
               - mediatek,mt2701-sysirq
               - mediatek,mt2712-sysirq
+              - mediatek,mt6572-sysirq
               - mediatek,mt6580-sysirq
               - mediatek,mt6582-sysirq
               - mediatek,mt6589-sysirq