Add support for DMI-MEMBUF bus failures to fapi

I noticed this error message the other day -
  processEIBusCallouts - Bus between target types not
  known (0x00000027:0x00000004)

The effect of this is that we don't end up with the bus error
procedure getting added to the error log like it should be.

Change-Id: Iecc5f6df2f9c6812d70c5ea66ad0f46dc9bb2694
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/83671
Reviewed-by: Christian R Geddes <crgeddes@us.ibm.com>
Reviewed-by: Corey V Swenson <cswenson@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: William G Hoffa <wghoffa@us.ibm.com>

src/usr/fapi2/plat_utils.C

@@ -942,6 +942,13 @@ void processEIBusCallouts(const ErrorInfo & i_errInfo,
         {
             l_busType = HWAS::DMI_BUS_TYPE;
         }
+        else if ( ((l_type1 == TARGETING::TYPE_DMI) &&
+                   (l_type2 == TARGETING::TYPE_MEMBUF)) ||
+                  ((l_type1 == TARGETING::TYPE_MEMBUF) &&
+                   (l_type2 == TARGETING::TYPE_DMI)) )
+        {
+            l_busType = HWAS::DMI_BUS_TYPE;
+        }
         else if ((l_type1 == TARGETING::TYPE_ABUS) &&
                  (l_type2 == TARGETING::TYPE_ABUS))
         {