PEL: Put validation fail details into journal msg

In the PEL section classes, move some journal fields from the journal
metadata section into the journal message itself, to make debug slightly
easier.

Specifically, this is just for when unflattening or validating the
sections fail.

Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Change-Id: I6d5661015b5ce5c07ed2fd6eb7ce864d0c620092
diff --git a/extensions/openpower-pels/src.cpp b/extensions/openpower-pels/src.cpp
index 8058155..0b4de6c 100644
--- a/extensions/openpower-pels/src.cpp
+++ b/extensions/openpower-pels/src.cpp
@@ -306,7 +306,8 @@
     }
     catch (const std::exception& e)
     {
-        log<level::ERR>("Cannot unflatten SRC", entry("ERROR=%s", e.what()));
+        log<level::ERR>(
+            fmt::format("Cannot unflatten SRC: {}", e.what()).c_str());
         _valid = false;
     }
 }
@@ -449,15 +450,17 @@
     if ((header().id != static_cast<uint16_t>(SectionID::primarySRC)) &&
         (header().id != static_cast<uint16_t>(SectionID::secondarySRC)))
     {
-        log<level::ERR>("Invalid SRC section ID",
-                        entry("ID=0x%X", header().id));
+        log<level::ERR>(
+            fmt::format("Invalid SRC section ID: {0:#x}", header().id).c_str());
         failed = true;
     }
 
     // Check the version in the SRC, not in the header
     if (_version != srcVersion)
     {
-        log<level::ERR>("Invalid SRC version", entry("VERSION=0x%X", _version));
+        log<level::ERR>(
+            fmt::format("Invalid SRC version: {0:#x}", header().version)
+                .c_str());
         failed = true;
     }