Kernel: Move SpinLock.h into Locking/

Author: https://github.com/boricj
Commit: 2c3b0baf76
Pull-request: https://github.com/SerenityOS/serenity/pull/8851
Reviewed-by: https://github.com/awesomekling ✅
Reviewed-by: https://github.com/bgianfo

Kernel/Memory/AddressSpace.cpp

@@ -5,13 +5,13 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <Kernel/Locking/SpinLock.h>
 #include <Kernel/Memory/AddressSpace.h>
 #include <Kernel/Memory/AnonymousVMObject.h>
 #include <Kernel/Memory/InodeVMObject.h>
 #include <Kernel/Memory/MemoryManager.h>
 #include <Kernel/PerformanceManager.h>
 #include <Kernel/Process.h>
-#include <Kernel/SpinLock.h>
 
 namespace Kernel::Memory {