Staging: ipack: remove last TODO items

The code is checkpatch clean, and the logic and flow looks good to me,
so I don't think there's anything left to do here.

Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Cc: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>