net: fill in MODULE_DESCRIPTION()s for arcnet

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to arcnet module.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/arcnet/arcnet.c

@@ -108,6 +108,7 @@ static int go_tx(struct net_device *dev);
 
 static int debug = ARCNET_DEBUG;
 module_param(debug, int, 0);
+MODULE_DESCRIPTION("ARCnet core driver");
 MODULE_LICENSE("GPL");
 
 static int __init arcnet_init(void)