be2net: Issue fw_init/clean cmds to fw

These cmds are issued to the fw in probe/resume and remove/suspend
paths to help fw execute some initialization and cleanup code.

This change needed the be_hw_up() code to be refactored as be_get_config().

Signed-off-by: Sathya Perla <sathyap@serverengines.com>
Signed-off-by: David S. Miller <davem@davemloft.net>