OFI: make v1.10 and v2.0 fit in version checking scheme

v1.10 is now in the same compatibility level as v1.7/v1.8 (there
is/will be no v1.9 series).  v2.0 now takes over for what used to be
called v1.9.

ompi/mca/mtl/ofi/mtl_ofi_compat.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2015 Intel, Inc.  All rights reserved.
+ * Copyright (c) 2015 Cisco Systems, Inc.  All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -15,10 +16,9 @@
 
 /************************************************************************/
 
-/* v1.9 and beyond */
+/* v2.0 and beyond */
 
-#if (OPAL_MAJOR_VERSION == 1 && OPAL_MINOR_VERSION >= 9) || \
-    (OPAL_MAJOR_VERSION >= 2)
+#if (OPAL_MAJOR_VERSION >= 2)
 
 #include "opal/mca/pmix/pmix.h"
 
@@ -42,7 +42,7 @@
 
 /************************************************************************/
 
-/* v1.7 and v1.8 */
+/* v1.7, v1.8, and v1.10 (there was no v1.9) */
 
 #elif (OPAL_MAJOR_VERSION == 1 && OPAL_MINOR_VERSION >= 7)