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>

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

include/configs/firefly-rk3288.h

@@ -11,4 +11,12 @@
 
 #define CONFIG_SPL_MMC_SUPPORT
 
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_SYS_MMC_ENV_DEV 0
+/* SPL @ 32k for ~36k
+ * ENV @ 96k
+ * u-boot @ 128K
+ */
+#define CONFIG_ENV_OFFSET (96 * 1024)
+
 #endif

include/configs/rk3288_common.h

@@ -11,7 +11,6 @@
 
 #define CONFIG_SYS_NO_FLASH
 #define CONFIG_NR_DRAM_BANKS		1
-#define CONFIG_ENV_IS_NOWHERE
 #define CONFIG_ENV_SIZE			0x2000
 #define CONFIG_SYS_MAXARGS		16
 #define CONFIG_BAUDRATE			115200