isci: unify isci_host and scic_sds_controller

Remove the distinction between these two implementations and unify on
isci_host (local instances named ihost).  Hmmm, we had two
'oem_parameters' instances, one was unused... nice.

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/scsi/isci/remote_device.h b/drivers/scsi/isci/remote_device.h
index 4579858..bc4da20 100644
--- a/drivers/scsi/isci/remote_device.h
+++ b/drivers/scsi/isci/remote_device.h
@@ -402,17 +402,17 @@
 	u32 event_code);
 
 enum sci_status scic_sds_remote_device_start_io(
-	struct scic_sds_controller *controller,
+	struct isci_host *ihost,
 	struct isci_remote_device *idev,
 	struct isci_request *ireq);
 
 enum sci_status scic_sds_remote_device_start_task(
-	struct scic_sds_controller *controller,
+	struct isci_host *ihost,
 	struct isci_remote_device *idev,
 	struct isci_request *ireq);
 
 enum sci_status scic_sds_remote_device_complete_io(
-	struct scic_sds_controller *controller,
+	struct isci_host *ihost,
 	struct isci_remote_device *idev,
 	struct isci_request *ireq);