ARNDALE: Enable config to append MAC address to bootargs

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
diff --git a/include/configs/arndale5250.h b/include/configs/arndale5250.h
index 52ca2d1..0376d1f 100644
--- a/include/configs/arndale5250.h
+++ b/include/configs/arndale5250.h
@@ -227,6 +227,7 @@
 #ifdef CONFIG_CMD_NET
 #define CONFIG_USB_HOST_ETHER
 #define CONFIG_USB_ETHER_ASIX
+#define CONFIG_BOOTM_BOOTARGS_APPEND_MAC
 #endif /*CONFIG_CMD_NET*/
 
 #define CONFIG_CMD_DHCP