isci: remove sci_device_handle

It belies the fact that isci_remote_device and scic_sds_remote_device
are one in same object with the same lifetime rules.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 81a7733..6b0863e 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -179,8 +179,7 @@
 	struct smp_discover_response_protocols dev_protocols;
 	enum sci_status status = SCI_SUCCESS;
 	struct sas_task *task = isci_request_access_task(request);
-	struct scic_sds_remote_device *sci_device =
-		isci_device->sci_device_handle;
+	struct scic_sds_remote_device *sci_device = to_sci_dev(isci_device);
 
 	dev_dbg(&isci_host->pdev->dev,
 		"%s: isci_device = 0x%p; request = %p, "
@@ -408,7 +407,7 @@
 	unsigned long flags;
 
 	isci_device = isci_dev_from_domain_dev(task->dev);
-	sci_device = isci_device->sci_device_handle;
+	sci_device = to_sci_dev(isci_device);
 
 	/* do common allocation and init of request object. */
 	ret = isci_request_alloc_io(
@@ -1177,7 +1176,7 @@
 	/* complete the io request to the core. */
 	scic_controller_complete_io(
 		isci_host->core_controller,
-		isci_device->sci_device_handle,
+		to_sci_dev(isci_device),
 		request->sci_request_handle
 		);
 	/* NULL the request handle so it cannot be completed or