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/OSX/OSX.mm

@@ -182,6 +182,12 @@ void Init(void* window)
   IOHIDManagerUnscheduleFromRunLoop(HIDManager, CFRunLoopGetCurrent(), OurRunLoop);
 }
 
+void PopulateDevices(void* window)
+{
+  DeInit();
+  Init(window);
+}
+
 void DeInit()
 {
   // This closes all devices as well