usb: dwc3: gadget: Change to dev_dbg() when queuing to inactive gadget/ep

Since function drivers will still be active until dwc3_disconnect_gadget()
is called, some applications will continue to queue packets to DWC3
gadget.  This can lead to a flood of messages regarding failed ep queue,
as the endpoint is in the process of being disabled.  Change the log
level to debug, so that it can be enabled when debugging issues.
Signed-off-by: NWesley Cheng <wcheng@codeaurora.org>
Link: https://lore.kernel.org/r/20211018192647.32121-1-wcheng@codeaurora.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/dwc3/gadget.c

@@ -1813,7 +1813,7 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
 	struct dwc3		*dwc = dep->dwc;
 
 	if (!dep->endpoint.desc || !dwc->pullups_connected || !dwc->connected) {
-		dev_err(dwc->dev, "%s: can't queue to disabled endpoint\n",
+		dev_dbg(dwc->dev, "%s: can't queue to disabled endpoint\n",
 				dep->name);
 		return -ESHUTDOWN;
 	}