add arm64 support

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

arch/arm64/kernel/include/arch-bitops.h

@@ -0,0 +1,19 @@
+/* arch-bitops.h COPYRIGHT FUJITSU LIMITED 2015-2016 */
+#ifndef __HEADER_ARM64_COMMON_BITOPS_H
+#define __HEADER_ARM64_COMMON_BITOPS_H
+
+#ifndef INCLUDE_BITOPS_H
+# error only <bitops.h> can be included directly
+#endif
+
+#ifndef __ASSEMBLY__
+
+#include "bitops-fls.h"
+#include "bitops-__ffs.h"
+#include "bitops-ffz.h"
+#include "bitops-set_bit.h"
+#include "bitops-clear_bit.h"
+
+#endif /*__ASSEMBLY__*/
+#endif /* !__HEADER_ARM64_COMMON_BITOPS_H */
+