scsi: lpfc: FLOGI failures are reported when connected to a private loop.

When the HBA is connected to a private loop, the driver reports FLOGI
loop-open failure as functional error. This is an expected condition.

Mark loop-open failure as a warning instead of error.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>