netconsole: Remove duplicate "netconsole: " logging prefix

It's already added by pr_fmt so remove the explicit use.
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/netconsole.c

@@ -358,7 +358,7 @@ static ssize_t enabled_store(struct config_item *item,
 		if (err)
 			goto out_unlock;
 
-		pr_info("netconsole: network logging started\n");
+		pr_info("network logging started\n");
 	} else {	/* false */
 		/* We need to disable the netconsole before cleaning it up
 		 * otherwise we might end up in write_msg() with