x86: galileo: Enable saving environment in SPI flash

Saving U-Boot's environment in SPI flash on Intel Galileo board.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sg@chromium.org>

include/configs/galileo.h

@@ -62,4 +62,12 @@
 #define CONFIG_DW_ALTDESCRIPTOR
 #define CONFIG_PHYLIB
 
+/* Environment configuration */
+#undef CONFIG_ENV_IS_NOWHERE
+#undef CONFIG_ENV_SIZE
+#define CONFIG_ENV_IS_IN_SPI_FLASH
+#define CONFIG_ENV_SIZE			0x1000
+#define CONFIG_ENV_SECT_SIZE		0x1000
+#define CONFIG_ENV_OFFSET		0
+
 #endif	/* __CONFIG_H */