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/dcmihandler.cpp b/dcmihandler.cpp
index cfe8be2..304a764 100644
--- a/dcmihandler.cpp
+++ b/dcmihandler.cpp
@@ -24,7 +24,7 @@
 using InternalFailure =
     sdbusplus::error::xyz::openbmc_project::common::InternalFailure;
 
-void register_netfn_dcmi_functions() __attribute__((constructor));
+void registerNetFnDcmiFunctions() __attribute__((constructor));
 
 constexpr auto pcapPath = "/xyz/openbmc_project/control/host0/power_cap";
 constexpr auto pcapInterface = "xyz.openbmc_project.Control.Power.Cap";
@@ -1171,7 +1171,7 @@
     return ipmi::responseSuccess(totalInstances, numRecords, sensors);
 }
 
-void register_netfn_dcmi_functions()
+void registerNetFnDcmiFunctions()
 {
     // <Get Power Limit>
     registerGroupHandler(ipmi::prioOpenBmcBase, ipmi::groupDCMI,