Move CPU() macro to it's own header from wtf/Platform.h

Source/wtf/Atomics.h

 /*
  * Copyright (C) 2007, 2008, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer. 
@@ skipping 41 matching lines @@
  * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  * DEALINGS IN THE SOFTWARE.
  */
 
 #ifndef Atomics_h
 #define Atomics_h
 
-#include <wtf/Platform.h>
-#include <wtf/StdLibExtras.h>
-#include <wtf/UnusedParam.h>
+#include "wtf/CPU.h"
+#include "wtf/Platform.h"
+#include "wtf/StdLibExtras.h"
+#include "wtf/UnusedParam.h"
 
 #if OS(WINDOWS)
 #include <windows.h>
 #elif OS(ANDROID)
 #include <sys/atomics.h>
 #endif
 
 namespace WTF {
 
 #if OS(WINDOWS)
@@ skipping 136 matching lines @@
 #endif
 
 } // namespace WTF
 
 #if USE(LOCKFREE_THREADSAFEREFCOUNTED)
 using WTF::atomicDecrement;
 using WTF::atomicIncrement;
 #endif
 
 #endif // Atomics_h