sunxi: Add axp209 pmic support

Add support for the x-powers axp209 pmic which is found on most A10, A13 and
A20 boards.

And enable AXP209 support for the Cubietruck and Cubieboard boards.

Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/include/configs/sun7i.h b/include/configs/sun7i.h
index 9b693f7..d9be104 100644
--- a/include/configs/sun7i.h
+++ b/include/configs/sun7i.h
@@ -13,6 +13,7 @@
  * A20 specific configuration
  */
 #define CONFIG_SUN7I		/* sun7i SoC generation */
+#define CONFIG_CLK_FULL_SPEED		912000000
 
 #define CONFIG_SYS_PROMPT		"sun7i# "