drivers/net/tokenring: fix sparse warnings: make symbols static

Fix this sparse warnings:

  drivers/net/tokenring/ibmtr.c:1840:6: warning: symbol 'tok_rerun' was not declared. Should it be static?
  drivers/net/tokenring/madgemc.c:469:16: warning: symbol 'madgemc_setnselout_pins' was not declared. Should it be static?
  drivers/net/tokenring/proteon.c:286:16: warning: symbol 'proteon_setnselout_pins' was not declared. Should it be static?
  drivers/net/tokenring/skisa.c:303:16: warning: symbol 'sk_isa_setnselout_pins' was not declared. Should it be static?

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tokenring/ibmtr.c b/drivers/net/tokenring/ibmtr.c
index 9fd0993..fa7bce6e0 100644
--- a/drivers/net/tokenring/ibmtr.c
+++ b/drivers/net/tokenring/ibmtr.c
@@ -1837,8 +1837,8 @@
 
 /*****************************************************************************/
 
-void tok_rerun(unsigned long dev_addr){
-
+static void tok_rerun(unsigned long dev_addr)
+{
 	struct net_device *dev = (struct net_device *)dev_addr;
 	struct tok_info *ti = netdev_priv(dev);