PRD: add 'max spares exceeded' attentions to checkstop root cause

Change-Id: I2ca5b468c27ba89485b11e41a5dfb3e217816bcf
CQ: SW445233
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/65970
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Benjamin J. Weisenbeck <bweisenb@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/gerrit1/66081
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/cen/cen_centaur.rule

@@ -964,7 +964,7 @@ rule rDMIFIR
 };
 
 group gDMIFIR filter priority( 10, 2, 11, 12, 9  ),
-                     cs_root_cause( 12 )
+                     cs_root_cause( 10, 12 )
 {
     /** DMIFIR[0]
      *  RX invalid state or parity error

src/usr/diag/prdf/common/plat/p9/p9_mc.rule

@@ -534,7 +534,7 @@ rule rIOMCFIR
     IOMCFIR & ~IOMCFIR_MASK &  IOMCFIR_ACT0 &  IOMCFIR_ACT1;
 };
 
-group gIOMCFIR filter singlebit, cs_root_cause( 12, 20, 28, 36 )
+group gIOMCFIR filter singlebit, cs_root_cause( 10, 12, 18, 20, 26, 28, 34, 36 )
 {
     /** IOMCFIR[0]
      *  RX_INVALID_STATE_OR_PARITY_ERROR