s3c64xx: Add ifdef at the S3C64XX only codes

The s3c6400.h file is only for S3C64XX cpu and the pheripheral port
address(0x70000000 - 0x7fffffff) exists at only S3C64XX cpu, so they
should be included by only S3C64XX cpu.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/cpu/arm1176/cpu.c b/cpu/arm1176/cpu.c
index 2c0014f..befa0cd 100644
--- a/cpu/arm1176/cpu.c
+++ b/cpu/arm1176/cpu.c
@@ -33,7 +33,9 @@
 
 #include <common.h>
 #include <command.h>
+#ifdef CONFIG_S3C64XX
 #include <asm/arch/s3c6400.h>
+#endif
 #include <asm/system.h>
 
 static void cache_flush (void);