wandboard: Include <input.h>

Include <input.h> in order to fix the following sparse warning:

wandboard.c:278:5: warning: symbol 'overwrite_console' was not declared. Should it be static?

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

board/wandboard/wandboard.c

@@ -26,6 +26,7 @@
 #include <netdev.h>
 #include <linux/fb.h>
 #include <phy.h>
+#include <input.h>
 
 DECLARE_GLOBAL_DATA_PTR;