Update the registered IPMI method name

Update registered IPMI method names to use `Lower Camel Case`.

Change-Id: I5539771c4ba8567f6cdb22aa3c8df58db5e883f2
Signed-off-by: George Liu <liuxiwei@ieisystem.com>
diff --git a/systemintfcmds.cpp b/systemintfcmds.cpp
index 7768030..c7206af 100644
--- a/systemintfcmds.cpp
+++ b/systemintfcmds.cpp
@@ -13,7 +13,7 @@
 #include <cstring>
 #include <fstream>
 
-void register_netfn_app_functions() __attribute__((constructor));
+void registerNetFnAppFunctions() __attribute__((constructor));
 
 using namespace sdbusplus::server::xyz::openbmc_project::control;
 
@@ -149,7 +149,7 @@
     __attribute__((init_priority(101)));
 } // namespace
 
-void register_netfn_app_functions()
+void registerNetFnAppFunctions()
 {
     // <Read Event Message Buffer>
     ipmi::registerHandler(ipmi::prioOpenBmcBase, ipmi::netFnApp,