scsi: bfa: Remove unnecessary struct declarations

struct bfa_fcs_s is declared twice. First is declared at line 50, remove
the duplicate.

struct bfa_fcs_fabric_s is defined at line 175, remove unnecessary
declaration.

Link: https://lore.kernel.org/r/20210401063535.992487-1-wanjiabing@vivo.com
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>