KVM: x86: Do not rely on implicit inclusions

Works so far by change, but it is not guaranteed to stay like this.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

arch/x86/kvm/cpuid.c

@@ -14,6 +14,8 @@
 
 #include <linux/kvm_host.h>
 #include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/uaccess.h>
 #include <asm/user.h>
 #include <asm/xsave.h>
 #include "cpuid.h"