PEL: Print action flags into JSON aligned

"User Header": {
    "Section Version":          "1",
    "Sub-section type":         "0",
    "Log Committed by":         "0x4552",
    "Subsystem":                "System Hypervisor Firmware",
    "Event Scope":              "Entire Platform",
    "Event Severity":           "Informational Event",
    "Event Type":               "Miscellaneous, Informational Only",
    "Action Flags": [
                                "Report Externally"
    ]
}

Testing: Manually run peltool and verified output
Signed-off-by: Harisuddin Mohamed Isa <harisuddin@gmail.com>
Change-Id: Ie8376953b5f1baa093fc0aa9564d50cd4208564e
diff --git a/extensions/openpower-pels/pel_values.hpp b/extensions/openpower-pels/pel_values.hpp
index 8d86acf..9a1ed88 100644
--- a/extensions/openpower-pels/pel_values.hpp
+++ b/extensions/openpower-pels/pel_values.hpp
@@ -33,6 +33,16 @@
 std::string getValue(const uint8_t field, const pel_values::PELValues& values);
 
 /**
+ * @brief Helper function to get value vector from lookup tables.
+ *
+ * @param[in] value - the value to lookup
+ * @param[in] table - lookup table
+ *
+ * @return std::vector<std::string> - the value vector
+ */
+std::vector<std::string> getValuesBitwise(uint16_t value,
+                                          const pel_values::PELValues& table);
+/**
  * @brief Find the desired entry in a PELValues table based on the
  *        field value.
  *