be2net: Show newly flashed FW ver in ethtool

This fix provides a newly flashed FW version (appended, in braces)
along with the currently running FW version via ethtool. The newly
flashed version runs only after a system reset.

Signed-off-by: Suresh Reddy <Suresh.Reddy@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>