rockchip: spl: Support full-speed CPU in SPL

Add a feature which speeds up the CPU to full speed in SPL to minimise
boot time. This is only supported for certain boards (at present only
jerry).

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/chromebook_jerry.h b/include/configs/chromebook_jerry.h
index 6e32f2c..e07d057 100644
--- a/include/configs/chromebook_jerry.h
+++ b/include/configs/chromebook_jerry.h
@@ -24,4 +24,7 @@
 
 #define CONFIG_KEYBOARD
 
+#define CONFIG_SPL_POWER_SUPPORT
+#define CONFIG_SPL_I2C_SUPPORT
+
 #endif