PEL: Add service procedure to find SUE root cause

An SUE indicates a UE has occurred in another area of hardware. This
procedure instructs service to look for previous PEL for the root cause
of the SUE attention.

Signed-off-by: Zane Shelley <zshelle@us.ibm.com>
Change-Id: Id9b7e6c65a06e52587ac40464456be42b9a557b1
diff --git a/extensions/openpower-pels/pel_values.cpp b/extensions/openpower-pels/pel_values.cpp
index 8a78e9e..9924dde 100644
--- a/extensions/openpower-pels/pel_values.cpp
+++ b/extensions/openpower-pels/pel_values.cpp
@@ -225,7 +225,10 @@
     // Problem is somewhere in the FSI bus path
     {"fsi_path", "BMC0004"},
     // Problem is over-current PSU fault
-    {"power_overcurrent", "BMC0005"}};
+    {"power_overcurrent", "BMC0005"},
+    // An unrecoverable event occurred, look for previous errors for the cause
+    {"find_sue_root_cause", "BMC0006"},
+};
 
 /**
  * @brief Map of the registry names for the symbolic FRUs to their