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/util.cpp b/util.cpp
index f95d851..f66f20b 100644
--- a/util.cpp
+++ b/util.cpp
@@ -24,7 +24,7 @@
 static constexpr auto dbus_pwm = "/xyz/openbmc_project/control/fanpwm/";
 static constexpr auto sysfs = "/sys/";
 
-IOInterfaceType GetWriteInterfaceType(const std::string& path)
+IOInterfaceType getWriteInterfaceType(const std::string& path)
 {
     if (path.empty() || "None" == path)
     {
@@ -45,7 +45,7 @@
     return IOInterfaceType::UNKNOWN;
 }
 
-IOInterfaceType GetReadInterfaceType(const std::string& path)
+IOInterfaceType getReadInterfaceType(const std::string& path)
 {
     if (path.empty() || "None" == path)
     {