Input: mma8450 - switch to using polled mode of input devices

We have added polled mode to the normal input devices with the intent of
retiring input_polled_dev. This converts mma8450 driver to use the polling
mode of standard input devices and removes dependency on INPUT_POLLDEV.

Link: https://lore.kernel.org/r/20191017204217.106453-19-dmitry.torokhov@gmail.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>