PEL: Read SRC fields out of the registry

The SRC (System Reference code) is a section in the PEL and several of
its fields are sourced from the message registry.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I4ca7d18a8225f2667b762015c6fd74bfb59d70ff
diff --git a/extensions/openpower-pels/pel_types.hpp b/extensions/openpower-pels/pel_types.hpp
index caa75c2..b836942 100644
--- a/extensions/openpower-pels/pel_types.hpp
+++ b/extensions/openpower-pels/pel_types.hpp
@@ -35,5 +35,11 @@
     extUserData = 0x4544         // 'ED'
 };
 
+enum class SRCType
+{
+    bmcError = 0xBD,
+    powerError = 0x11
+};
+
 } // namespace pels
 } // namespace openpower