arm64: dts: ti: k3-j784s4-main: Add WIZ and SERDES PHY nodes

J784S4 SoC has 4 Serdes instances along with their respective WIZ
instances. Add device-tree nodes for them and disable them by default
as the node is incomplete and phy link properties will be added in
the platform dt file.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
[j-choudhary@ti.com: fix serdes_wiz clock order & disable serdes refclk]
Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20231019054022.175163-3-j-choudhary@ti.com


Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>