usb: dwc3: ep0: purge dev_dbg() calls

The last few dev_dbg() messages are converted to
tracepoints and we can finally ignore dev_dbg()
messages during debug sessions.
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/dwc3/ep0.c

@@ -971,7 +971,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 		ret = usb_gadget_map_request(&dwc->gadget, &req->request,
 				dep->number);
 		if (ret) {
-			dev_dbg(dwc->dev, "failed to map request\n");
+			dwc3_trace(trace_dwc3_ep0, "failed to map request\n");
 			return;
 		}
 
@@ -999,7 +999,7 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 		ret = usb_gadget_map_request(&dwc->gadget, &req->request,
 				dep->number);
 		if (ret) {
-			dev_dbg(dwc->dev, "failed to map request\n");
+			dwc3_trace(trace_dwc3_ep0, "failed to map request\n");
 			return;
 		}