arm64: dts: ti: k3-am65: Add full compatible to SerDes control nodes

This matches the binding for this register region which fixes a couple
DTS check warnings.

While here trim the leading 0s from the "reg" definition.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20240326185627.29852-1-afd@ti.com


Signed-off-by: Nishanth Menon <nm@ti.com>