westcos: fixed initialization of driver data

Signed-off-by: Frank Morgner <morgner@informatik.hu-berlin.de>

Updated by Viktor Tarasov
dnie: dont ignore error on sm free operation

Signed-off-by: Frank Morgner <morgner@informatik.hu-berlin.de>
cardos,incrypto34: restored semantics of select_pin_reference
fixed one more warning