pnor: Add updatable association to active PNOR FW

Add 'updateable' association to the active PNOR
firmware version object. This 'updateable' association
can be used to mark all the firmware components
which can be programmable from pnor interfaces like
Redfish.

Signed-off-by: Miguel Gomez <mgomez@mx1.ibm.com>
Change-Id: I33f7ac70c8bfa446aeb045c65c741e2d72ce108a
diff --git a/item_updater.hpp b/item_updater.hpp
index 33dc05b..1fcb2d0 100644
--- a/item_updater.hpp
+++ b/item_updater.hpp
@@ -142,6 +142,13 @@
      */
     virtual void createActiveAssociation(const std::string& path);
 
+    /** @brief Creates a updateable association to the
+     *  "running" BMC software image
+     *
+     * @param[in]  path - The path to create the association.
+     */
+    virtual void createUpdateableAssociation(const std::string& path);
+
     /** @brief Updates the functional association to the
      *  new "running" PNOR image
      *