Clean up the intrinsics #ifdef mess

Source/Core/Common/Atomic_Win32.h

@@ -6,10 +6,10 @@
 
 #pragma once
 
-#include <intrin.h>
 #include <Windows.h>
 
 #include "Common/Common.h"
+#include "Common/Intrinsics.h"
 
 // Atomic operations are performed in a single step by the CPU. It is
 // impossible for other threads to see the operation "half-done."

Source/Core/Common/Hash.cpp

@@ -4,11 +4,9 @@
 
 #include <algorithm>
 #include "Common/CommonFuncs.h"
-#include "Common/Hash.h"
-#if _M_SSE >= 0x402
 #include "Common/CPUDetect.h"
-#include <nmmintrin.h>
-#endif
+#include "Common/Hash.h"
+#include "Common/Intrinsics.h"
 
 static u64 (*ptrHashFunction)(const u8 *src, u32 len, u32 samples) = &GetMurmurHash3;
 

Source/Core/Common/x64CPUDetect.cpp

@@ -7,13 +7,9 @@
 
 #include "Common/CommonTypes.h"
 #include "Common/CPUDetect.h"
+#include "Common/Intrinsics.h"
 
-#ifdef _WIN32
-#include <intrin.h>
-#else
-
-//#include <config/i386/cpuid.h>
-#include <xmmintrin.h>
+#ifndef _WIN32
 
 #if defined __FreeBSD__
 #include <sys/types.h>

Source/Core/Common/x64FPURoundMode.cpp

@@ -7,12 +7,7 @@
 #include "Common/CommonTypes.h"
 #include "Common/CPUDetect.h"
 #include "Common/FPURoundMode.h"
-
-#ifdef _WIN32
-#	include <mmintrin.h>
-#else
-#	include <xmmintrin.h>
-#endif
+#include "Common/Intrinsics.h"
 
 namespace FPURoundMode
 {