phy: cadence-torrent: Add single link USXGMII configuration for 156.25MHz refclk

Add register sequences for single link USXGMII configuration supporting
156.25MHz reference clock frequency.
Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20230530143853.26571-2-sjakhade@cadence.comSigned-off-by: Vinod Koul <vkoul@kernel.org>