add arm64 support

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

arch/arm64/kernel/cputable.c

@@ -0,0 +1,14 @@
+/* cputable.c COPYRIGHT FUJITSU LIMITED 2015 */
+
+#include <cputable.h>
+
+extern unsigned long __cpu_setup(void);
+struct cpu_info cpu_table[] = {
+	{
+		.cpu_id_val	= 0x000f0000,
+		.cpu_id_mask	= 0x000f0000,
+		.cpu_name	= "AArch64 Processor",
+		.cpu_setup	= __cpu_setup,
+	},
+	{ /* Empty */ },
+};