isci: unify port stop handlers

Implement the stop handlers directly in scic_sds_port_stop()

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Piotr Sawicki <piotr.sawicki@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 7abfb66..a942384 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -1591,10 +1591,8 @@
 
 	for (index = 0; index < scic->logical_port_entries; index++) {
 		struct scic_sds_port *sci_port = &ihost->ports[index].sci;
-		scic_sds_port_handler_t stop;
 
-		stop = sci_port->state_handlers->stop_handler;
-		port_status = stop(sci_port);
+		port_status = scic_sds_port_stop(sci_port);
 
 		if ((port_status != SCI_SUCCESS) &&
 		    (port_status != SCI_FAILURE_INVALID_STATE)) {