scsi: fc: use bsg_job_done

fc_bsg_jobdone() and bsg_job_done() are 1:1 copies now so use the
bsg-lib one instead of the FC private implementation.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Acked-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>