style: member functions should be lower camel

Rename member functions to be lower camel instead of snake case.

Change-Id: Ib227fd3dadb6d9607290277205223a4324cd4ce5
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/pid/pidcontroller.cpp b/pid/pidcontroller.cpp
index 524b0ef..cbe2452 100644
--- a/pid/pidcontroller.cpp
+++ b/pid/pidcontroller.cpp
@@ -33,16 +33,16 @@
     float output;
 
     // Get setpt value
-    setpt = setpt_proc();
+    setpt = setptProc();
 
     // Get input value
-    input = input_proc();
+    input = inputProc();
 
     // Calculate new output
-    output = ec::pid(get_pid_info(), input, setpt);
+    output = ec::pid(getPIDInfo(), input, setpt);
 
     // Output new value
-    output_proc(output);
+    outputProc(output);
 
     return;
 }