staging: netlogic: replace skb_put/pull pair with skb_reserve

The sequence

    skb_put(skb);
    skb_pull(skb);

leads to the same result as

    skb_reserve(skb);

but second is a little shorter and clearer.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>