be2net: add a log message for POST timeout in Lancer

This patch adds a log message in case of POST timeout in Lancer to
help debugging failure cases. It also logs sliport_status register value in
case of POST timeout.

Signed-off-by: Kalesh AP <kalesh.purayil@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>