Implement command to retrieve firmware version

Currently, it only supports retrieving BMC/BIOS versions

Change-Id: I58bce16c491f18d27d3989e47814365de091954b
Signed-off-by: John Wang <wangzhiqiang02@ieisystem.com>
diff --git a/src/asset_info.cpp b/src/asset_info.cpp
index 78a7c85..af03fce 100644
--- a/src/asset_info.cpp
+++ b/src/asset_info.cpp
@@ -201,7 +201,7 @@
 
 void registerOEMFunctions(void)
 {
-    ipmi_register_callback(netFnIei, iei::cmdSetAssetInfo, nullptr,
+    ipmi_register_callback(netFnIEI, iei::cmdSetAssetInfo, nullptr,
                            ipmiOemIEIAssetInfo, SYSTEM_INTERFACE);
 }