pm suspend methodology and ipc update

Change-Id: I63b84285b4ee99623f8e7b7c8498226aa25da2e4
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/41942
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-by: Brian T. Vanderpool <vanderp@us.ibm.com>
Reviewed-by: Prachi Gupta <pragupta@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/42615
Tested-by: FSP CI Jenkins <fsp-CI-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>
Reviewed-by: Dean Sanner <dsanner@us.ibm.com>

src/import/chips/p9/procedures/hwp/lib/p9_pm_hcd_flags.h

@@ -205,7 +205,8 @@ enum PM_GPE_OCC_SCRATCH2_DEFS
     SPGE_DEBUG_TRAP_ENABLE                      = 8,
     CME_DEBUG_TRAP_ENABLE                       = 9,
     PGPE_DEBUG_TRAP_ENABLE                      = 10,
-    L3_CONTAINED_MODE                           = 11
+    L3_CONTAINED_MODE                           = 11,
+    PGPE_SAFE_MODE_ERROR                        = 12
 };
 
 //