dt-bindings: phy-mt65xx-usb: supports PCIe, SATA and rename file

add support for PCIe and SATA, also add some new compatibles.

due to phy-mt65xx-usb.txt holds the bindings for all mediatek SoCs
with T-PHY controller, change the name to phy-mtk-tphy.txt to
reflect that.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>