arm64: dts: ti: k3-am69-sk: Enable mcu network port

Enable networking for NFS and basic networking functionality.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Link: https://lore.kernel.org/r/20230602214937.2349545-6-nm@ti.com


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