- Remove unneeded input_free_device() after input_unregister_device().

- Add pca9532_destroy_devices() function for destroy devices.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NDmitry Torokhov <dtor@mail.ru>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>