dt-bindings: phy: ti,phy-j721e-wiz: Add bindings for AM64 SERDES Wrapper

Add bindings for AM64 SERDES Wrapper.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210310112745.3445-2-kishon@ti.com


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