rockchip: firefly: Save the environment on SD card

Save the environment on the SD card for Firefly in the empty space
between the SPL and the u-boot image.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/chromebook_jerry.h b/include/configs/chromebook_jerry.h
index a22b123..058325c 100644
--- a/include/configs/chromebook_jerry.h
+++ b/include/configs/chromebook_jerry.h
@@ -9,6 +9,7 @@
 
 #include <configs/rk3288_common.h>
 
+#define CONFIG_ENV_IS_NOWHERE
 #define CONFIG_SPL_SPI_SUPPORT
 #define CONFIG_SPL_SPI_FLASH_SUPPORT
 #define CONFIG_SPL_SPI_LOAD