phy: cdns-dphy: Add support for DPHY TX on J721e

Add support new compatible for dphy-tx on j721e
and implement dphy ops required.

Signed-off-by: Rahul T R <r-ravikumar@ti.com>
Reviewed-by: Pratyush Yadav <p.yadav@ti.com>
Link: https://lore.kernel.org/r/20220623125433.18467-4-r-ravikumar@ti.com


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