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/builderconfig.hpp b/pid/builderconfig.hpp
index a7f41f8..8390bee 100644
--- a/pid/builderconfig.hpp
+++ b/pid/builderconfig.hpp
@@ -9,5 +9,5 @@
 #include <unordered_map>
 
 std::unordered_map<int64_t, std::unique_ptr<PIDZone>>
-    BuildZonesFromConfig(const std::string& path, SensorManager& mgr,
+    buildZonesFromConfig(const std::string& path, SensorManager& mgr,
                          sdbusplus::bus::bus& modeControlBus);