[NET]: make net/core/dev.c:netdev_nit static

netdev_nit can now become static.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/core/dev.c b/net/core/dev.c
index aa84549..f1c52cb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -230,7 +230,7 @@
  *	For efficiency
  */
 
-int netdev_nit;
+static int netdev_nit;
 
 /*
  *	Add a protocol ID to the list. Now that the input handler is