oem-ibm: add readFileByTypeIntoMemory handler

Add a handler for file type 'LID', which are host firmware image files
on IBM systems. These would be read by the host firmware as it boots.

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: I83e3ee398a4c6a4198a40b8b2188a3c11d0e55c4
diff --git a/oem/ibm/libpldmresponder/file_io_type_pel.cpp b/oem/ibm/libpldmresponder/file_io_type_pel.cpp
index 400d336..014511c 100644
--- a/oem/ibm/libpldmresponder/file_io_type_pel.cpp
+++ b/oem/ibm/libpldmresponder/file_io_type_pel.cpp
@@ -25,6 +25,12 @@
 
 using namespace phosphor::logging;
 
+int PelHandler::readIntoMemory(uint32_t /*offset*/, uint32_t /*length*/,
+                               uint64_t /*address*/)
+{
+    return PLDM_ERROR_UNSUPPORTED_PLDM_CMD;
+}
+
 int PelHandler::writeFromMemory(uint32_t offset, uint32_t length,
                                 uint64_t address)
 {