If you're trying to describe the process of making something suitable for a desk, here are some possibilities:
* Desk-ify: This is a more common way to create a verb from "desk".
* Desk-bound: This describes something that is confined to a desk.
* Desk-friendly: This describes something that is convenient or appropriate for use at a desk.
If you can give me more context about how you're using the word "deskize," I might be able to provide a better answer.