implement commands for dump xfer

This commit implements the writeFile command
for dumpHandler in PLDM oem. This is for offloading
the dump from host memory to an external location
via bmc. Also it implements the newfileAvailable
notification handler in libpldmresponder.This caters
to the new dump notification coming from the Host

Change-Id: Ibf7c1facea282ec4f772dfee646cca9f7877bb7d
Signed-off-by: Sampa Misra <sampmisr@in.ibm.com>
diff --git a/oem/ibm/libpldm/file_io.h b/oem/ibm/libpldm/file_io.h
index 15a6818..53f4343 100644
--- a/oem/ibm/libpldm/file_io.h
+++ b/oem/ibm/libpldm/file_io.h
@@ -51,6 +51,7 @@
 	PLDM_FILE_TYPE_PEL = 0,
 	PLDM_FILE_TYPE_LID_PERM = 1,
 	PLDM_FILE_TYPE_LID_TEMP = 2,
+	PLDM_FILE_TYPE_DUMP = 3,
 };
 
 #define PLDM_RW_FILE_MEM_REQ_BYTES 20