dt-bindings: arm: mediatek: Add mt8188 pericfg compatible

Add mt8188 pericfg compatible to binding document.
Signed-off-by: jason-ch chen <Jason-ch.Chen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20231023083839.24453-3-jason-ch.chen@mediatek.comSigned-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

Documentation/devicetree/bindings/arm/mediatek/mediatek,pericfg.yaml

@@ -28,6 +28,7 @@ properties:
               - mediatek,mt8173-pericfg
               - mediatek,mt8183-pericfg
               - mediatek,mt8186-pericfg
+              - mediatek,mt8188-pericfg
               - mediatek,mt8195-pericfg
               - mediatek,mt8516-pericfg
           - const: syscon