PRD: give MC chiplets priority for channel failure analysis

Change-Id: I1a6d7136d36f197cae14f8d2dd1a0c62c9c1335e
CQ: SW443356
Backport: release-fips921
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/65093
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Caleb N. Palmer <cnpalmer@us.ibm.com>
Reviewed-by: Brian J. Stegmiller <bjs@us.ibm.com>
Reviewed-by: Zane C. Shelley <zshelle@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/65137
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>

src/usr/diag/prdf/common/plat/p9/p9_cumulus.rule

@@ -1547,7 +1547,8 @@ rule rGLOBAL_FIR
     GLOBAL_RE_FIR;
 };
 
-group gGLOBAL_FIR attntype CHECK_STOP, RECOVERABLE filter singlebit
+# Priority put on MC chiplets because of channel failures analysis.
+group gGLOBAL_FIR attntype CHECK_STOP, RECOVERABLE filter priority( 7, 8 )
 {
     /** GLOBAL_FIR[1]
      *  Attention from TP chiplet