PEL: Fix typo in function name

Change-Id: I8d6907344151c803e91afdf8c6c3deb904ec315e
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/extensions/openpower-pels/data_interface.hpp b/extensions/openpower-pels/data_interface.hpp
index 29ba22e..0deebf8 100644
--- a/extensions/openpower-pels/data_interface.hpp
+++ b/extensions/openpower-pels/data_interface.hpp
@@ -1012,8 +1012,8 @@
      * @param[in] path - The object path of the inventory item.
      * @param[in] properties - The properties map
      */
-    void notifyPresenceSubsribers(const std::string& path,
-                                  const DBusPropertyMap& properties);
+    void notifyPresenceSubscribers(const std::string& path,
+                                   const DBusPropertyMap& properties);
 
     /**
      * @brief Adds the Ufcs- prefix to the location code passed in