rockchip: firefly-rk3288: Enable HDMI output

Enable HDMI output and a console on firefly.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/firefly-rk3288.h b/include/configs/firefly-rk3288.h
index 8ac6521..d6423e7 100644
--- a/include/configs/firefly-rk3288.h
+++ b/include/configs/firefly-rk3288.h
@@ -7,7 +7,10 @@
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
-#define ROCKCHIP_DEVICE_SETTINGS
+#define ROCKCHIP_DEVICE_SETTINGS \
+		"stdin=serial,cros-ec-keyb\0" \
+		"stdout=serial,vidconsole\0" \
+		"stderr=serial,vidconsole\0"
 
 #include <configs/rk3288_common.h>
 
@@ -21,4 +24,8 @@
  */
 #define CONFIG_ENV_OFFSET (96 * 1024)
 
+#define CONFIG_I2C_EDID
+#define CONFIG_SYS_WHITE_ON_BLACK
+#define CONFIG_CONSOLE_SCROLL_LINES		10
+
 #endif