use the real nonblocking ops instead of the dummy ops

src/mpi/romio/adio/ad_pvfs2/ad_pvfs2.c

@@ -22,8 +22,8 @@ struct ADIOI_Fns_struct ADIO_PVFS2_operations = {
     ADIOI_PVFS2_ReadStrided, /* ReadStrided */
     ADIOI_PVFS2_WriteStrided, /* WriteStrided */
     ADIOI_PVFS2_Close, /* Close */
-    ADIOI_FAKE_IreadContig, /* IreadContig */
-    ADIOI_FAKE_IwriteContig, /* IwriteContig */
+    ADIOI_PVFS2_IreadContig, /* IreadContig */
+    ADIOI_PVFS2_IwriteContig, /* IwriteContig */
     ADIOI_FAKE_IODone, /* ReadDone */
     ADIOI_FAKE_IODone, /* WriteDone */
     ADIOI_FAKE_IOComplete, /* ReadComplete */