arm: odroid: Increase default env size in preparation for distro_bootcmd.

Adding distro_bootcmd support bumps the default environment size over
4500. Increase to SZ_16K to allow for room to grow in the future.

Acked-by: Lukasz Majewski <lukma@denx.de>

Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/include/configs/odroid.h b/include/configs/odroid.h
index b7b75c0..07882ac 100644
--- a/include/configs/odroid.h
+++ b/include/configs/odroid.h
@@ -50,7 +50,7 @@
 #define CONFIG_SYS_MONITOR_BASE	0x00000000
 
 #define CONFIG_SYS_MMC_ENV_DEV		CONFIG_MMC_DEFAULT_DEV
-#define CONFIG_ENV_SIZE			4096
+#define CONFIG_ENV_SIZE			SZ_16K
 #define CONFIG_ENV_OFFSET		(SZ_1K * 1280) /* 1.25 MiB offset */
 #define CONFIG_ENV_OVERWRITE