From the ACGME web site, the RRC requirements for Psychiatry training state:
II.B.4. The nonphysician faculty must have appropriate qualifications in their field and hold appropriate institutional appointments.
So you can infer that psychologists are allowed in your training.
The requirements for therapy supervision state:
IV.A.6.d) Residents must receive a minimum of two hours of direct supervision per week, at least one of which is individual.
So it says nothing about who is qualified, or that it has to be MDs. In fact, the only place I know of that says anything about non DM disciplines is under co-students:
III.D. Appointment of Fellows and Other Learners
The presence of other learners (including, but not limited to, residents from other specialties, subspecialty fellows, PhD students, and nurse practitioners) in the program must not interfere with the appointed residents’ education
So I’m guessing you are good to go. I think our program would lose a lot if psychologist were not part of the teaching.