x86: link: Add build options for SPL

If SPL is used we want to use the generic SPL framework and boot from SPI
via a board-specific means. Add these options to the board config file.

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

include/configs/chromebook_link.h

@@ -19,4 +19,13 @@
 #define CONFIG_ENV_SECT_SIZE		0x1000
 #define CONFIG_ENV_OFFSET		0x003f8000
 
+#define CONFIG_SPL_FRAMEWORK
+
+#define CONFIG_SPL_TEXT_BASE		0xfffd0000
+
+#define BOOT_DEVICE_SPI			10
+
+#define CONFIG_SPL_BOARD_LOAD_IMAGE
+#define BOOT_DEVICE_BOARD		11
+
 #endif	/* __CONFIG_H */