linux-phytec-ti

usb: cdns3: make dynamic role switching work

We need to the flow as in "Figure 14. Software OTG Control"
in user guide.

This meens we need to request for HOST_BUS_REQ/DEV_BUS_REQ
while starting host/device role respectively.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>