isci: task.h compile and checkpatch fixes

A usage of "FALSE" leaked in as well as some checkpatch escapes.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/task.h

@@ -306,7 +306,6 @@ isci_task_set_completion_status(
 	* is in the error path.
 	*/
 	if (task->task_state_flags & SAS_TASK_NEED_DEV_RESET) {
-
 		/* Fail the I/O to make sure it goes into the error path. */
 		response = SAS_TASK_UNDELIVERED;
 		status = SAM_STAT_TASK_ABORTED;
@@ -317,22 +316,19 @@ isci_task_set_completion_status(
 	task->task_status.stat = status;
 
 	switch (task_notification_selection) {
-
 	case isci_perform_aborted_io_completion:
 		/* This path can occur with task-managed requests as well as
 		 * requests terminated because of LUN or device resets.
 		 */
 		/* Fall through to the normal case... */
-
 	case isci_perform_normal_io_completion:
 		/* Normal notification (task_done) */
 		isci_set_task_doneflags(task);
 		break;
-
 	default:
-			WARN_ON(FALSE);
+		WARN_ONCE(1, "unknown task_notification_selection: %d\n",
+			 task_notification_selection);
 		/* Fall through to the error case... */
-
 	case isci_perform_error_io_completion:
 		/* Use sas_task_abort */
 		/* Leave SAS_TASK_STATE_DONE clear