x86: Add missing include and structure in asm/parasite-syscall.h

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Tested-by: Alexander Kartashov <alekskartashov@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

arch/x86/include/asm/parasite-syscall.h

 #ifndef __CR_ASM_PARASITE_SYSCALL_H__
 #define __CR_ASM_PARASITE_SYSCALL_H__
 
+#include "asm/types.h"
+
+struct parasite_ctl;
 
 #define ARCH_SI_TRAP SI_KERNEL