phy: cadence-torrent: Add USXGMII(156.25MHz) + SGMII/QSGMII(100MHz) multilink configuration

Add register sequences for USXGMII(156.25MHz) + SGMII/QSGMII(100MHz)
multilink configuration.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>