add arm64 support

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

arch/arm64/kernel/include/cputable.h

@@ -0,0 +1,12 @@
+/* cputable.h COPYRIGHT FUJITSU LIMITED 2015 */
+#ifndef __HEADER_ARM64_COMMON_CPUTABLE_H
+#define __HEADER_ARM64_COMMON_CPUTABLE_H
+
+struct cpu_info {
+	unsigned int	cpu_id_val;
+	unsigned int	cpu_id_mask;
+	const char	*cpu_name;
+	unsigned long	(*cpu_setup)(void);
+};
+
+#endif /* !__HEADER_ARM64_COMMON_CPUTABLE_H */