wandboard: remove superfluous include

No definition provided by input.h is used in the board file.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

board/wandboard/wandboard.c

@@ -28,7 +28,6 @@
 #include <miiphy.h>
 #include <netdev.h>
 #include <phy.h>
-#include <input.h>
 #include <i2c.h>
 #include <power/pmic.h>
 #include <power/pfuze100_pmic.h>