[SCSI] zfcp: cleanup, separation of ERP, non ERP-version for exchange_ functions

cleanup, using ERP request mempool for all ERP versions of
the exchange functions (exchange_config (ECD), exchange_port (EPD) )
providing individual versions of the ECD, EPD functions for ERP
and other purposes (_sync).

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
index 40fa056..31c2178 100644
--- a/drivers/s390/scsi/zfcp_erp.c
+++ b/drivers/s390/scsi/zfcp_erp.c
@@ -2197,7 +2197,7 @@
 	zfcp_erp_action_to_running(erp_action);
 	write_unlock_irq(&adapter->erp_lock);
 
-	ret = zfcp_fsf_exchange_port_data(erp_action, adapter, NULL);
+	ret = zfcp_fsf_exchange_port_data(erp_action);
 	if (ret == -EOPNOTSUPP) {
 		debug_text_event(adapter->erp_dbf, 3, "a_xport_notsupp");
 		return ZFCP_ERP_SUCCEEDED;