[SCSI] Unify SAM_ and SAM_STAT_ macros

We have two separate definitions for identical constants with nearly the
same name.  One comes from the generic headers in scsi.h; the other is
an enum in libsas.h ... it's causing confusion about which one is
correct (fortunately they both are).

Fix this by eliminating the libsas.h duplicate

Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index cd02cea..6ae059e 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -763,7 +763,7 @@
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-			task->task_status.stat == SAM_GOOD) {
+			task->task_status.stat == SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;
 		}
@@ -853,7 +853,7 @@
 		}
 
 		if (task->task_status.resp == SAS_TASK_COMPLETE &&
-			task->task_status.stat == SAM_GOOD) {
+			task->task_status.stat == SAM_STAT_GOOD) {
 			res = TMF_RESP_FUNC_COMPLETE;
 			break;