arm64: core support

Relocation code based on a patch by Scott Wood, which is:
Signed-off-by: Scott Wood <scottwood@freescale.com>

Signed-off-by: David Feng <fenghua@phytium.com.cn>
diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile
new file mode 100644
index 0000000..b6eb6de
--- /dev/null
+++ b/arch/arm/cpu/armv8/Makefile
@@ -0,0 +1,17 @@
+#
+# (C) Copyright 2000-2003
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+extra-y	:= start.o
+
+obj-y	+= cpu.o
+obj-y	+= generic_timer.o
+obj-y	+= cache_v8.o
+obj-y	+= exceptions.o
+obj-y	+= cache.o
+obj-y	+= tlb.o
+obj-y	+= gic.o
+obj-y	+= transition.o