Input: w90p910_keypad - change platfrom driver name to 'nuc900-kpi'

The name of platfrom device was changed and we need to make driver's
name match in order for it to bind to the device.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>