nds32: ftmac100 support cache enable.

Enable cache and ftmac100 performance can be improved.

Signed-off-by: rick <rick@andestech.com>
diff --git a/include/configs/adp-ae3xx.h b/include/configs/adp-ae3xx.h
index f47e45b..4378df5 100644
--- a/include/configs/adp-ae3xx.h
+++ b/include/configs/adp-ae3xx.h
@@ -23,8 +23,7 @@
 #define CONFIG_CMDLINE_EDITING
 #define CONFIG_PANIC_HANG
 
-#define CONFIG_SYS_ICACHE_OFF
-#define CONFIG_SYS_DCACHE_OFF
+#define CONFIG_ARCH_MAP_SYSMEM
 
 #define CONFIG_BOOTP_SEND_HOSTNAME
 #define CONFIG_BOOTP_SERVERIP