[Input System] xe_mutex revert

On request from chrisps, revert xe_mutex back to xe_unlikely_mutex to avoid mutex deadlocks while initializing hid-winkey.

src/xenia/hid/input_system.cc

@@ -137,8 +137,8 @@ X_INPUT_VIBRATION InputSystem::ModifyVibrationLevel(
   modified_vibration.right_motor_speed = 0;
   return modified_vibration;
 }
-std::unique_lock<xe_mutex> InputSystem::lock() {
-  return std::unique_lock<xe_mutex>{lock_};
+std::unique_lock<xe_unlikely_mutex> InputSystem::lock() {
+  return std::unique_lock<xe_unlikely_mutex>{lock_};
 }
 }  // namespace hid
 }  // namespace xe