mach-k3: common: Instantiate AM65 CPSW NUSS wrapper

Probe toplevel AM65 CPSW NUSS driver from misc_init_r() when driver
is enabled. Since driver is modeled as UCLASS_MISC, we need to
explicitly probe the driver. Use common misc_init_r() that entire
K3 family of SoCs.

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