x86: crownbay: Enable saving environment in SPI flash

Saving U-Boot's environment in SPI flash on Intel CrownBay board.
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NSimon Glass <sg@chromium.org>

include/configs/crownbay.h

@@ -60,4 +60,12 @@
 #undef CONFIG_VIDEO
 #undef CONFIG_CFB_CONSOLE
 
+/* 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 */