usb: cdns3: gadget: Replace trace_printk by dev_dbg

trace_printk should not be used in production code, replace it
call with dev_dbg.
Signed-off-by: NNicolas Boichat <drinkcat@chromium.org>

Link: https://lore.kernel.org/r/20200627070307.516803-2-drinkcat@chromium.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/cdns3/gadget.c

@@ -421,7 +421,7 @@ static int cdns3_start_all_request(struct cdns3_device *priv_dev,
 		if ((priv_req->flags & REQUEST_INTERNAL) ||
 		    (priv_ep->flags & EP_TDLCHK_EN) ||
 			priv_ep->use_streams) {
-			trace_printk("Blocking external request\n");
+			dev_dbg(priv_dev->dev, "Blocking external request\n");
 			return ret;
 		}
 	}