MLK-17312-4 usb: cdns3: gadget: fix the recognition issue when connection before...

MLK-17312-4 usb: cdns3: gadget: fix the recognition issue when connection before load module

At imx8qm/imx8qxp A0 chip, there is a vbus toggle issue, so we need to
force the vbus as high before connection, otherwise, there will be endless
connect/disconnect interrupts for USB2 and causes enumeration failure.
The current work flow only cover this during the role switch, but omit
it when the connection has established at module probe routine.

This patch fixes it by moving force vbus operation to cdns_set_role to
cover both static and dynamic recognition issue.

Acked-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>