dt-bindings: usb: mtk-xhci: add compatible for mt2701 and mt7623

Add two compatible for mt2701 and mt7623;

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20210201070016.41721-7-chunfeng.yun@mediatek.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>