scsi: bfa: Remove set but not used variable 'fchs'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/scsi/bfa/bfa_svc.c: In function 'uf_recv':
drivers/scsi/bfa/bfa_svc.c:5520:17: warning:
variable 'fchs' set but not used [-Wunused-but-set-variable]
struct fchs_s *fchs;
^

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/bfa/bfa_svc.c

···
 	struct bfa_uf_s *uf = &ufm->uf_list[uf_tag];
 	struct bfa_uf_buf_s *uf_buf;
 	uint8_t *buf;
-	struct fchs_s *fchs;
 
 	uf_buf = (struct bfa_uf_buf_s *)
 			bfa_mem_get_dmabuf_kva(ufm, uf_tag, uf->pb_len);
···
 
 	m->frm_len = be16_to_cpu(m->frm_len);
 	m->xfr_len = be16_to_cpu(m->xfr_len);
-
-	fchs = (struct fchs_s *)uf_buf;
 
 	list_del(&uf->qe);	/* dequeue from posted queue */