arm64: dts: ti: k3-j7200: Add CPSW5G nodes

Add CPSW5G nodes corresponding to the Quad Port Add-On Ethernet Card
present on the common processor board.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>