dt-bindings: usb: mtu3: Add ports property

Define the ports property in the mediatek,mtu3 device tree binding schema.
Include definitions for port@0 and port@1, specifying their roles as
High Speed (HS) and Super Speed (SS) data buses, respectively.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://lore.kernel.org/r/20250220142230.2530583-1-macpaul.lin@mediatek.com


Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>