Input: applespi - use correct struct names in comment

The incorrect structure name is being used in the comment for struct
touchpad_info_protocol. Correct it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220805174754.2374473-1-colin.i.king@gmail.com


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