ControllerInterface: replace Reinitialize with RefreshDevices

The SDL backend crashes when you close a joystick after SDL_Quit has
been called. Some backends don't need to be shutdown and
re-initialized everytime, we can just ask to enumerate devices again.

Source/Core/InputCommon/ControllerInterface/evdev/evdev.h

@@ -15,6 +15,7 @@ namespace ciface
 namespace evdev
 {
 void Init();
+void PopulateDevices();
 void Shutdown();
 
 class evdevDevice : public Core::Device