net/bridge/netfilter/ebtables.c: use available error handling code

Free the locally allocated table and newinfo as done in adjacent error
handling code.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/netfilter/ebtables.c

@@ -1198,7 +1198,8 @@ ebt_register_table(struct net *net, const struct ebt_table *input_table)
 
 	if (table->check && table->check(newinfo, table->valid_hooks)) {
 		BUGPRINT("The table doesn't like its own initial data, lol\n");
-		return ERR_PTR(-EINVAL);
+		ret = -EINVAL;
+		goto free_chainstack;
 	}
 
 	table->private = newinfo;