scsi: pm8001: Fix memory leak in pm8001_chip_fw_flash_update_req()

In pm8001_chip_fw_flash_update_build(), if
pm8001_chip_fw_flash_update_build() fails, the struct fw_control_ex
allocated must be freed.

Link: https://lore.kernel.org/r/20220220031810.738362-23-damien.lemoal@opensource.wdc.comReviewed-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/pm8001/pm8001_hwi.c

@@ -4873,8 +4873,10 @@ pm8001_chip_fw_flash_update_req(struct pm8001_hba_info *pm8001_ha,
 	ccb->ccb_tag = tag;
 	rc = pm8001_chip_fw_flash_update_build(pm8001_ha, &flash_update_info,
 		tag);
-	if (rc)
+	if (rc) {
+		kfree(fw_control_context);
 		pm8001_tag_free(pm8001_ha, tag);
+	}
 
 	return rc;
 }