phy: cadence-torrent: Add PHY link configuration sequences for single link

Add support to configure link_cmn_vals and xcvr_diag_vals in case of single
link PHY configuration.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-9-git-send-email-sjakhade@cadence.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>