scsi: lpfc: Remove unnecessary null check before kfree

A null check before a kfree is redundant, so remove it.  This is detected
by coccinelle.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Reviewed-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_bsg.c

@@ -1276,9 +1276,7 @@ lpfc_bsg_hba_set_event(struct bsg_job *job)
 	return 0; /* call job done later */
 
 job_error:
-	if (dd_data != NULL)
-		kfree(dd_data);
-
+	kfree(dd_data);
 	job->dd_data = NULL;
 	return rc;
 }