scsi: fcoe: Fix few small typos in fcoe.c

This patch does a cleanup and fixes few small typos in fcoe.c

Signed-off-by: Milan P. Gandhi <mgandhi@redhat.com>
Acked-by: Johannes Thumshirn <jth@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>