style: function names should be lower camel

Fix function names to be lower camel.

Change-Id: I145e1f4c03d7740bc1525dcffbdce2f78fd61075
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/pid/thermalcontroller.cpp b/pid/thermalcontroller.cpp
index cc6c1f9..5388823 100644
--- a/pid/thermalcontroller.cpp
+++ b/pid/thermalcontroller.cpp
@@ -35,7 +35,7 @@
     ec::pid_info_t* info = thermal->getPIDInfo();
     thermal->setSetpoint(setpoint);
 
-    InitializePIDStruct(info, initial);
+    initializePIDStruct(info, initial);
 
     return thermal;
 }