x86/cpu: Use definitions from "qemu/units.h"

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180625124238.25339-4-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

target/i386/cpu.c

@@ -18,6 +18,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/units.h"
 #include "qemu/cutils.h"
 #include "qemu/bitops.h"
 
@@ -65,9 +66,6 @@ struct CPUID2CacheDescriptorInfo {
     int associativity;
 };
 
-#define KiB 1024
-#define MiB (1024 * 1024)
-
 /*
  * Known CPUID 2 cache descriptors.
  * From Intel SDM Volume 2A, CPUID instruction