Kernel: Rename ScopedSpinlock => SpinlockLocker

This matches MutexLocker, and doesn't sound like it's a lock itself.

Kernel/Devices/HID/PS2MouseDevice.cpp

@@ -60,7 +60,7 @@ void PS2MouseDevice::irq_handle_byte_read(u8 byte)
         m_entropy_source.add_random_event(m_data.dword);
 
         {
-            ScopedSpinlock lock(m_queue_lock);
+            SpinlockLocker lock(m_queue_lock);
             m_queue.enqueue(parse_data_packet(m_data));
         }
         evaluate_block_conditions();