tg3: remove open-coded skb_cow_head.
tg3: remove open-coded skb_cow_head.

Signed-off-by: Francois Romieu <b6456b24ae82a7595be3173ae585c7a827f25f37@fr.zoreil.com>
Cc: Nithin Nayak Sujir <a41d72140302bfd55cac4982138967475b47eb43@broadcom.com>
Cc: Michael Chan <6b52f9d672b6134057900fe608467612b789a84e@broadcom.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs