ibm-oem: add FileAck handler for PELs

Extend the FileAck* commands to let the host firmware to ack PELs it has
received from the BMC.

Signed-off-by: vkaverap <vkaverap@in.ibm.com>
Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: Iafc1c92c64c8ea7a51367c2c36842613af1f46b5
diff --git a/oem/ibm/libpldmresponder/file_io_type_lid.hpp b/oem/ibm/libpldmresponder/file_io_type_lid.hpp
index d3a48a5..3a3332a 100644
--- a/oem/ibm/libpldmresponder/file_io_type_lid.hpp
+++ b/oem/ibm/libpldmresponder/file_io_type_lid.hpp
@@ -49,6 +49,11 @@
         return readFile(lidPath, offset, length, response);
     }
 
+    virtual int fileAck(uint8_t /*fileStatus*/)
+    {
+        return PLDM_ERROR_UNSUPPORTED_PLDM_CMD;
+    }
+
     /** @brief LidHandler destructor
      */
     ~LidHandler()