API to read IM value from system planar

This commit implements an API to read IM value from system planar using
the IM keyword offset value.

Change-Id: I69f48895aa814e31a4ce23bcf4f8aa954449c969
Signed-off-by: Anupama B R <anupama.b.r1@ibm.com>
diff --git a/vpd-manager/include/single_fab.hpp b/vpd-manager/include/single_fab.hpp
index 03c6cee..8587519 100644
--- a/vpd-manager/include/single_fab.hpp
+++ b/vpd-manager/include/single_fab.hpp
@@ -22,5 +22,12 @@
      * @return IM value on success, empty string otherwise.
      */
     std::string getImFromPersistedLocation() const noexcept;
+
+    /**
+     * @brief API to get IM value from system planar EEPROM path.
+     *
+     * @return IM value on success, empty string otherwise.
+     */
+    std::string getImFromPlanar() const noexcept;
 };
 } // namespace vpd