scsi: bfa: Fix warning comparing pointer to 0

Fix the following coccicheck warning:

./drivers/scsi/bfa/bfad_bsg.c:3412:29-30: WARNING comparing pointer to
0.

Link: https://lore.kernel.org/r/1615880930-120780-1-git-send-email-jiapeng.chong@linux.alibaba.comReported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/bfa/bfad_bsg.c

@@ -3409,7 +3409,7 @@ bfad_im_bsg_els_ct_request(struct bsg_job *job)
 
 	drv_fcxp->port = fcs_port->bfad_port;
 
-	if (drv_fcxp->port->bfad == 0)
+	if (!drv_fcxp->port->bfad)
 		drv_fcxp->port->bfad = bfad;
 
 	/* Fetch the bfa_rport - if nexus needed */