oem-ibm: add readFileByType handler

Add a handler for file type 'LID', to be able to read LID files over the
LPC channel.

Signed-off-by: Deepak Kodihalli <dkodihal@in.ibm.com>
Change-Id: I9db77f78b0aa4e289fb0ab940121569b431f4dfe
diff --git a/oem/ibm/libpldmresponder/file_io.hpp b/oem/ibm/libpldmresponder/file_io.hpp
index b67f0f9..07a13aa 100644
--- a/oem/ibm/libpldmresponder/file_io.hpp
+++ b/oem/ibm/libpldmresponder/file_io.hpp
@@ -160,6 +160,15 @@
 Response readFileByTypeIntoMemory(const pldm_msg* request,
                                   size_t payloadLength);
 
+/** @brief Handler for readFileByType command
+ *
+ *  @param[in] request - pointer to PLDM request payload
+ *  @param[in] payloadLength - length of the message
+ *
+ *  @return PLDM response message
+ */
+Response readFileByType(const pldm_msg* request, size_t payloadLength);
+
 /** @brief Handler for GetFileTable command
  *
  *  @param[in] request - pointer to PLDM request payload