dt-bindings: phy: cadence-torrent: Update Torrent PHY bindings for generic use

commit 00e11d78e8ee628b5728278669c781e8d39f8544 from
git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git

Torrent PHY can be used in different multi-link multi-protocol
configurations including protocols other than DisplayPort also,
such as PCIe, USB, SGMII, QSGMII etc. Update the bindings to have
support for these configurations.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Xulin Sun <xulin.sun@windriver.com>