board: wandboard: 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/wandboard/spl.c b/board/wandboard/spl.c
index 717e02a..9ce2785 100644
--- a/board/wandboard/spl.c
+++ b/board/wandboard/spl.c
@@ -5,7 +5,7 @@
  *         Richard Hu <hakahu@gmail.com>
  */
 
-#include <common.h>
+#include <config.h>
 #include <init.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/imx-regs.h>