oem-ibm: fixup error codes as per spec

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: If460b3d8ad5863de5437aa727bf30ec4c7715717
diff --git a/oem/ibm/libpldmresponder/file_io.cpp b/oem/ibm/libpldmresponder/file_io.cpp
index ff7f0ee..12e9fed 100644
--- a/oem/ibm/libpldmresponder/file_io.cpp
+++ b/oem/ibm/libpldmresponder/file_io.cpp
@@ -238,7 +238,7 @@
                   << length << "\n";
         encode_rw_file_memory_resp(request->hdr.instance_id,
                                    PLDM_READ_FILE_INTO_MEMORY,
-                                   PLDM_INVALID_READ_LENGTH, 0, responsePtr);
+                                   PLDM_ERROR_INVALID_LENGTH, 0, responsePtr);
         return response;
     }
 
@@ -277,7 +277,7 @@
                   << length << "\n";
         encode_rw_file_memory_resp(request->hdr.instance_id,
                                    PLDM_WRITE_FILE_FROM_MEMORY,
-                                   PLDM_INVALID_WRITE_LENGTH, 0, responsePtr);
+                                   PLDM_ERROR_INVALID_LENGTH, 0, responsePtr);
         return response;
     }
 
@@ -570,7 +570,7 @@
         std::cerr << "Length is not a multiple of DMA minSize, LENGTH="
                   << length << "\n";
         encode_rw_file_by_type_memory_resp(request->hdr.instance_id, cmd,
-                                           PLDM_INVALID_WRITE_LENGTH, 0,
+                                           PLDM_ERROR_INVALID_LENGTH, 0,
                                            responsePtr);
         return response;
     }