net: missing call of trace_napi_poll in busy_poll_stop

Noticed that busy_poll_stop() also invoke the drivers napi->poll()
function pointer, but didn't have an associated call to trace_napi_poll()
like all other call sites.
Signed-off-by: NJesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -5289,6 +5289,7 @@ static void busy_poll_stop(struct napi_struct *napi, void *have_poll_lock)
 	 * Ideally, a new ndo_busy_poll_stop() could avoid another round.
 	 */
 	rc = napi->poll(napi, BUSY_POLL_BUDGET);
+	trace_napi_poll(napi, rc, BUSY_POLL_BUDGET);
 	netpoll_poll_unlock(have_poll_lock);
 	if (rc == BUSY_POLL_BUDGET)
 		__napi_schedule(napi);