drivers/net/arcnet: fix sparse warning: symbol shadows an earlier one

Impact: Remove redundant inner scope variable.

Fix this sparse warning:
  drivers/net/arcnet/arcnet.c:383:21: warning: symbol 'count' shadows an earlier one
  drivers/net/arcnet/arcnet.c:375:13: originally declared here
Signed-off-by: NHannes Eder <hannes@hanneseder.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/arcnet/arcnet.c

@@ -380,7 +380,6 @@ int arcnet_open(struct net_device *dev)
 		return -ENODEV;
 
 	BUGLVL(D_PROTO) {
-		int count;
 		BUGMSG(D_PROTO, "protocol map (default is '%c'): ",
 		       arc_proto_default->suffix);
 		for (count = 0; count < 256; count++)