cpuid: move specifics into a directory

CMakeLists.txt

@@ -190,8 +190,8 @@ endif ()
 
 if (host_cpu STREQUAL "x86_64")
     list (APPEND UTIL_FILES
-        cpuid_x86.cpp
-        cpuid_x86.hpp
+        cpuid/x86.cpp
+        cpuid/x86.hpp
     )
 else ()
     message (FATAL_ERROR "Unknown architecture ${host_cpu}")

cpuid.hpp

@@ -27,7 +27,7 @@ namespace cruft::cpu {
 };
 
 #if defined(PROCESSOR_AMD64)
-#include "cpuid_x86.hpp"
+#include "cpuid/x86.hpp"
 #else
 #error "Unhandled architecture"
 #endif

cpuid/x86.cpp

@@ -6,7 +6,7 @@
  * Copyright 2018 Danny Robson <danny@nerdcruft.net>
  */
 
-#include "cpuid_x86.hpp"
+#include "x86.hpp"
 
 #include "endian.hpp"
 #include "view.hpp"