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Some hardware implementations require to configure pins differently according to the USB role (host/device), this can be an update of the pins routing or a simple GPIO value change. This patch introduces new optional "host" and "device" pinctrls. If these pinctrls are defined by the device, they are respectively selected on host/device role start. Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Signed-off-by: Peter Chen <peter.chen@nxp.com>