MLK-14396 usb: chipidea: add mutex for concurrent running

MLK-14396 usb: chipidea: add mutex for concurrent running

The ci_handle_id_switch is called at two places, at very rare situations,
it may be running at the same time. Eg, when the system is back from
the resume, the id event is occurred from extcon driver, as well as
power_lost work item is called due to the controller is poweroff at
the suspend.

Signed-off-by: Peter Chen <peter.chen@nxp.com>