scsi: megaraid_sas: Do not set HBA Operational if FW is not in operational state

After issuing a adapter reset, driver blindly used to set adprecovery flag
to OPERATIONAL state.  Add a check to see if the FW is operational before
setting the flag and marking reset adapter successful.

Link: https://lore.kernel.org/r/1579000882-20246-7-git-send-email-anand.lodnoor@broadcom.com
Signed-off-by: Shivasharan S <shivasharan.srikanteshwara@broadcom.com>
Signed-off-by: Anand Lodnoor <anand.lodnoor@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>