drivers/net: fix sparse warning: use ANSI-style function declaration

Fix this sparse warning:

  drivers/net/ne.c:932:24: warning: non-ANSI function declaration of function 'init_module'
Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ne.c

@@ -929,7 +929,7 @@ static void __init ne_add_devices(void)
 }
 
 #ifdef MODULE
-int __init init_module()
+int __init init_module(void)
 {
 	int retval;
 	ne_add_devices();