Since psionics will be totally different from magic, and the deuce can't interact with each other (except with special spells/powers), you could say that it's no spell-like ability anymore. Since the "psionics are different" rules are house rules anyway (although more or less "official" house rules), you can house rule that as well (the PsiHB doesn't state either way, and there are good arguments for both sides).
But if you use forsakers, and if you use psionics as something different from magic, you might update the forsaker class that it may not use psionics either (for balanding reasons).