PEL: Add symbolic FRU support to FRUIdentity

A symbolic FRU is a FRU where the part is known, but the part number is
not available for it.  A trusted symbolic FRU adds the requirement that
the location code is known to be correct so it can be used for lighting
LEDs and FRU replacement.

The symbolic FRU name shares the same field as the part number.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I2fa936d9d7235c5cff245effcdb9d445aefffe23
diff --git a/extensions/openpower-pels/pel_values.hpp b/extensions/openpower-pels/pel_values.hpp
index 04c287d..5f8b852 100644
--- a/extensions/openpower-pels/pel_values.hpp
+++ b/extensions/openpower-pels/pel_values.hpp
@@ -136,6 +136,11 @@
  */
 extern const std::map<std::string, std::string> maintenanceProcedures;
 
+/**
+ * @brief Map for symbolic FRUs.
+ */
+extern const std::map<std::string, std::string> symbolicFRUs;
+
 } // namespace pel_values
 } // namespace pels
 } // namespace openpower