Removes ZeroFrog's "optimized" memcpy and memcmp functions.

These were only compiled in on Windows and x86_32.
They provided "optimized" copies and compares based on blocksizes for the AMD Athlon and Duron CPU families.
The code was taken from something that AMD provides with a as-is license.
Just get rid of this crap.

Source/Core/VideoBackends/Software/XFMemLoader.cpp

@@ -61,7 +61,7 @@ void SWLoadXFReg(u32 transferSize, u32 baseAddress, u32 *pData)
 	// write to XF regs
 	if (transferSize > 0)
 	{
-		memcpy_gc((u32*)(&xfmem) + baseAddress, pData, transferSize * 4);
+		memcpy((u32*)(&xfmem) + baseAddress, pData, transferSize * 4);
 		XFWritten(transferSize, baseAddress);
 	}
 }