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: Nicolas Boichat <[e-mail]>

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/cdns3/gadget.c

···
 		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;
 		}
 	}