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/zone.hpp b/pid/zone.hpp
index 6d5f6cc..d2da92c 100644
--- a/pid/zone.hpp
+++ b/pid/zone.hpp
@@ -74,8 +74,8 @@
     void updateSensors(void);
     void initializeCache(void);
     void dumpCache(void);
-    void process_fans(void);
-    void process_thermals(void);
+    void processFans(void);
+    void processThermals(void);
 
     void addFanPID(std::unique_ptr<Controller> pid);
     void addThermalPID(std::unique_ptr<Controller> pid);