Add keypad driver for the 4x4 keypad on an evaluation board based
on w90p910.
Signed-off-by: NWan ZongShun <mcuos.com@gmail.com>
Reviewed-by: NTrilok Soni <soni.trilok@gmail.com>
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>