bna: remove set but not used variable 'pgoff'

drivers/net/ethernet/brocade/bna/bfa_ioc.c: In function
‘bfa_ioc_fwver_clear’:
drivers/net/ethernet/brocade/bna/bfa_ioc.c:1127:13: warning: variable
‘pgoff’ set but not used [-Wunused-but-set-variable]

It is never used, and so can be removed.
Signed-off-by: Nyu kuai <yukuai3@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/brocade/bna/bfa_ioc.c

@@ -1124,11 +1124,10 @@ bfa_nw_ioc_sem_release(void __iomem *sem_reg)
 static void
 bfa_ioc_fwver_clear(struct bfa_ioc *ioc)
 {
-	u32 pgnum, pgoff, loff = 0;
+	u32 pgnum, loff = 0;
 	int i;
 
 	pgnum = PSS_SMEM_PGNUM(ioc->ioc_regs.smem_pg0, loff);
-	pgoff = PSS_SMEM_PGOFF(loff);
 	writel(pgnum, ioc->ioc_regs.host_page_num_fn);
 
 	for (i = 0; i < (sizeof(struct bfi_ioc_image_hdr) / sizeof(u32)); i++) {