Prevent multiple HID elements of same usage type on OSX

On OSX, iterate the HID device's elements and only store the last of
each type to accommodate for flaky hardware

Source/Core/InputCommon/ControllerInterface/OSX/OSXJoystick.mm

@@ -2,6 +2,7 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#include <algorithm>
 #include <sstream>
 
 #include <Foundation/Foundation.h>
@@ -49,11 +50,26 @@ Joystick::Joystick(IOHIDDeviceRef device, std::string name)
 
   if (axes)
   {
+    std::vector<IOHIDElementRef> elems;
     for (int i = 0; i < CFArrayGetCount(axes); i++)
     {
       IOHIDElementRef e = (IOHIDElementRef)CFArrayGetValueAtIndex(axes, i);
       // DeviceElementDebugPrint(e, nullptr);
+      uint32_t usage = IOHIDElementGetUsage(e);
 
+      // Check for any existing elements with the same usage
+      auto it = std::find_if(elems.begin(), elems.end(), [usage](const auto& ref) {
+        return usage == IOHIDElementGetUsage(ref);
+      });
+
+      if (it == elems.end())
+        elems.push_back(e);
+      else
+        *it = e;
+    }
+
+    for (auto e : elems)
+    {
       if (IOHIDElementGetUsage(e) == kHIDUsage_GD_Hatswitch)
       {
         AddInput(new Hat(e, m_device, Hat::up));
@@ -67,6 +83,7 @@ Joystick::Joystick(IOHIDDeviceRef device, std::string name)
                         new Axis(e, m_device, Axis::positive));
       }
     }
+
     CFRelease(axes);
   }