add arm64 support

- add arm64 dependent codes with GICv3 and SVE support
- fix bugs based on architecture separation requests

arch/arm64/kernel/vdso/syscall.h

@@ -0,0 +1,15 @@
+/* syscall.h COPYRIGHT FUJITSU LIMITED 2016 */
+#ifndef __HEADER_ARM64_VDSO_SYSCALL_H
+#define __HEADER_ARM64_VDSO_SYSCALL_H
+
+#define DECLARATOR(number,name)		.equ __NR_##name, number
+#define SYSCALL_HANDLED(number,name)	DECLARATOR(number,name)
+#define SYSCALL_DELEGATED(number,name)	DECLARATOR(number,name)
+
+#include <syscall_list.h>
+
+#undef DECLARATOR
+#undef SYSCALL_HANDLED
+#undef SYSCALL_DELEGATED
+
+#endif	/* !__HEADER_ARM64_VDSO_SYSCALL_H */