mtu3_dbg_trace
mtu3_dbg_trace(mtu->dev, "link speed %s",
void mtu3_dbg_trace(struct device *dev, const char *fmt, ...);
mtu3_dbg_trace(ssusb->dev, "set role : %s", usb_role_string(desired_role));
mtu3_dbg_trace(mtu->dev, "ep0_state %s", decode_ep0_state(mtu));