phy: cdns-dphy: Add band config for dphy tx

Add support for band ctrl config for dphy tx.

Signed-off-by: Rahul T R <r-ravikumar@ti.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/20220623125433.18467-3-r-ravikumar@ti.com


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