arm64: dts: ti: k3-j7200-main: Add USB controller

j7200 has on USB controller instance. Add that.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20200930122032.23481-5-rogerq@ti.com