[This answer was deleted for no reason whatsoever. I cannot improve it, because I don't know was so wrong about it. Please, undelete this or tell me what did I do to deserve this.]
Omnipotence is such an absurd concept that it leads to absurd conclusions.
An omnipotent being can and will do anything it needs to do, instantly without any uncertain attempts or intermediate steps. Whenever a need arises it is satisfied instantly.
Therefore an omnipotent being has no choice and no free will.
Free will is the ability to choose the method by which we satisfy our needs. An omnipotent being does not have to choose, it can make things right instantly.
One could even say that an omnipotent being has no needs at all, no reason to do anything at all.