net: Make static

Sparse asked whether these could be static.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/irda/timer.c

@@ -219,7 +219,7 @@ static void irlap_backoff_timer_expired(void *data)
  *
  *
  */
-void irlap_media_busy_expired(void* data)
+static void irlap_media_busy_expired(void *data)
 {
 	struct irlap_cb *self = (struct irlap_cb *) data;