arm: mach-k3: am62x: am625_init: Probe AM65 CPSW NUSS

In order to support Ethernet boot on AM62x, probe AM65 CPSW NUSS
driver in board_init_f().

Reviewed-by: Alexander Sverdlin <alexander.sverdlin@siemens.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Chintan Vankar <c-vankar@ti.com>