Staging: speakup: free after input_unregister_device()

input_unregister_device() frees the device so the call to
input_free_device() is a double free.

Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/speakup/fakekey.c

···
 {
 	if (virt_keyboard != NULL) {
 		input_unregister_device(virt_keyboard);
-		input_free_device(virt_keyboard);
 		virt_keyboard = NULL;
 	}
 }