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: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/arcnet/arcnet.c b/drivers/net/arcnet/arcnet.c
index a80d4a3..d6d4ab3 100644
--- a/drivers/net/arcnet/arcnet.c
+++ b/drivers/net/arcnet/arcnet.c
@@ -380,7 +380,6 @@
 		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++)