board: atmel: Remove <common.h> and add needed includes

Remove <common.h> from this board vendor directory and when needed
add missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/atmel/at91sam9n12ek/at91sam9n12ek.c b/board/atmel/at91sam9n12ek/at91sam9n12ek.c
index a3e294c..afc0c05 100644
--- a/board/atmel/at91sam9n12ek/at91sam9n12ek.c
+++ b/board/atmel/at91sam9n12ek/at91sam9n12ek.c
@@ -4,7 +4,7 @@
  * Josh Wu <josh.wu@atmel.com>
  */
 
-#include <common.h>
+#include <config.h>
 #include <init.h>
 #include <net.h>
 #include <vsprintf.h>