tipc: Don't reset the timeout when restarting

As it may then take longer than what the user specified using
setsockopt(SO_RCVTIMEO).

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>