Set the SKBTX_IN_PROGRESS bit in tx_flags dp83640_txtstamp when doing
tx timestamps as per Documentation/networking/timestamping.txt.
Signed-off-by: NStefan Sørensen <stefan.sorensen@spectralink.com>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>