tg3: Add skb->xmit_more support
tg3: Add skb->xmit_more support

Ring TX doorbell only if xmit_more is not set or the queue is stopped.

Suggested-by: Daniel Borkmann <9ff04a02a69f376b2b9aeec27187017cbf3cf5f9@redhat.com>
Signed-off-by: Prashant Sreedharan <09aa524fb1e1ba6416355a63919894a109767f81@broadcom.com>
Signed-off-by: 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