staging: gdm72xx: potential use after free in send_qos_list()

Sometimes free_qos_entry() sometimes frees its argument.  I have moved
the dereference of "entry" ahead on line to avoid a use after free.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm72xx/gdm_qos.c

@@ -250,8 +250,8 @@ static void send_qos_list(struct nic *nic, struct list_head *head)
 
 	list_for_each_entry_safe(entry, n, head, list) {
 		list_del(&entry->list);
-		free_qos_entry(entry);
 		gdm_wimax_send_tx(entry->skb, entry->dev);
+		free_qos_entry(entry);
 	}
 }