Move arch config into config.mk
diff --git a/Makefile b/Makefile
index 0fa86a6..a79d3df 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,7 @@
 # Capstone Disassembler Engine
 # By Nguyen Anh Quynh <aquynh@gmail.com>, 2013>
+#
+include config.mk
 
 CC = $(CROSS)gcc
 AR ?= $(CROSS)ar
@@ -19,8 +21,6 @@
 
 LIBNAME = capstone
 
-CAPSTONE_ARCHS = arm x86 mips aarch64
-
 LIBOBJ =
 LIBOBJ += cs.o utils.o SStream.o MCInstrDesc.o MCRegisterInfo.o
 ifneq (,$(findstring arm,$(CAPSTONE_ARCHS)))