x86: chromebook_link: Enable the Chrome OS EC

Enable the Chrome OS EC so that it can be used from U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/chromebook_link.h b/include/configs/chromebook_link.h
index 48ae81e..645b31c 100644
--- a/include/configs/chromebook_link.h
+++ b/include/configs/chromebook_link.h
@@ -62,6 +62,11 @@
 #define VIDEO_IO_OFFSET				0
 #define CONFIG_X86EMU_RAW_IO
 
+#define CONFIG_CROS_EC
+#define CONFIG_CROS_EC_LPC
+#define CONFIG_CMD_CROS_EC
+#define CONFIG_ARCH_EARLY_INIT_R
+
 #define CONFIG_STD_DEVICES_SETTINGS     "stdin=usbkbd,vga,serial\0" \
 					"stdout=vga,serial\0" \
 					"stderr=vga,serial\0"