s3c64xx: move the reset_cpu function

Because of the reset_cpu is soc specific, should be move to soc
And read reset value from SYS_ID register instead of hard code
this patch also supports s3c6410

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/cpu/arm1176/s3c64xx/Makefile b/cpu/arm1176/s3c64xx/Makefile
index 4656d9a..b527939 100644
--- a/cpu/arm1176/s3c64xx/Makefile
+++ b/cpu/arm1176/s3c64xx/Makefile
@@ -28,6 +28,8 @@
 
 LIB	= $(obj)lib$(SOC).a
 
+SOBJS	= reset.o
+
 COBJS-$(CONFIG_S3C6400)	+= cpu_init.o speed.o
 COBJS-y	+= timer.o