Remove outlet from switch
First: don't guess: open up the box and see what is wired to the second switch.  Second: to provide direct power to the outlet, you just need to move its hot (usually black) wire to the input feed, rather than the output side of the switch.

EDIT: per the comment, I should have made it clear that you're not to wire directly to the switch itself, but rather, via wire nuts, to the incoming hot black wird.

Standard warning: if that isn't clear to you, you should bring someone in who's familiar with wiring rather than risk injury to yourself or the house.