The hystart code was written with assumption that HZ=1000.
Replace the use of jiffies with bictcp_clock as a millisecond
real time clock.
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Reported-by: NLucas Nussbaum <lucas.nussbaum@loria.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>