arm64: dts: ti: k3-am654-idk: Add ICSSG Ethernet ports

The IDK application board has 4 Gigabit Ethernet ports.

This patch adds support for the 4 Gigabit Ethernet ports
which are provided by ICSSG0 and ICSSG1.
The IEP0 SYNC_OUT0 pins are used for PPS out on the IDK card.

Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Link: https://lore.kernel.org/r/20231020051937.3709871-4-danishanwar@ti.com


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