FAPI2: Add FAPI2_RC_PLAT_MISCOMPARE

To be used by platform getScom implementations for multicast-compare
failures, but the description is deliberately kept generic so other
calls can return this too if it fits.

Change-Id: Ib3cbe182b2d5e1c9307c945594816df7c3ac284d
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/86879
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Nicholas E Bofferding <bofferdn@us.ibm.com>
Reviewed-by: Dean Sanner <dsanner@us.ibm.com>
Reviewed-by: Joseph J McGill <jmcgill@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/97070
Reviewed-by: Steven B Janssen <janssens@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Kahn C Evans <kahnevan@us.ibm.com>
Reviewed-by: Jennifer A Stofer <stofer@us.ibm.com>

Author: fenkes-ibm

import/hwpf/fapi2/include/return_code_defs.H

@@ -5,7 +5,7 @@
 /*                                                                        */
 /* OpenPOWER HCODE Project                                                */
 /*                                                                        */
-/* COPYRIGHT 2012,2018                                                    */
+/* COPYRIGHT 2012,2020                                                    */
 /* [+] International Business Machines Corp.                              */
 /*                                                                        */
 /*                                                                        */
@@ -117,6 +117,10 @@ enum ReturnCodes : uint32_t
 
     FAPI2_RC_PLAT_TOR_HEADER_DATA_INVALID = FAPI2_RC_PLAT_MASK | 0x07,
     //Accessing TOR ring section fail because TOR magic word not found
+
+    FAPI2_RC_PLAT_MISCOMPARE              = FAPI2_RC_PLAT_MASK | 0x08,
+    ///< An operation (like a getScom using multicast-compare) failed
+    ///< because the returned data was different from a reference value.
 };
 
 }