add arm64 support

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

arch/arm64/kernel/include/const.h

@@ -0,0 +1,23 @@
+/* const.h COPYRIGHT FUJITSU LIMITED 2015 */
+#ifndef __HEADER_ARM64_COMMON_CONST_H
+#define __HEADER_ARM64_COMMON_CONST_H
+
+#ifndef __ASSEMBLY__
+#define __AC(X,Y)	(X##Y)
+#define _AC(X,Y)	__AC(X,Y)
+#define _AT(T,X)	((T)(X))
+#else /* !__ASSEMBLY__ */
+#define _AC(X,Y)	X
+#define _AT(T,X)	X
+#endif /* !__ASSEMBLY__ */
+
+#define _BITUL(x)	(_AC(1,UL) << (x))
+#define _BITULL(x)	(_AC(1,ULL) << (x))
+
+/*
+ * Allow for constants defined here to be used from assembly code
+ * by prepending the UL suffix only with actual C code compilation.
+ */
+#define UL(x) _AC(x, UL)
+
+#endif /* !__HEADER_ARM64_COMMON_CONST_H */