linux-imx

LF-592 usb: chipidea: handle single role for usb role class

If usb port is configed to be single role, but usb role class
is trying to set unavailable role, don't try to do role change.

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