Input: tosakbd - fix cleaning up KEY_STROBEs after error

Direct to fail2 to gpio_free() the KEY_STROBEs as well as the KEY_SENSEs.

[dtor@mail.ru: change keymap from unsigned int to unsigned short]
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>