TPA3220: Single supply operation - can I use AVDD to pull up RESET?
From this document: 


  Special consideration must be taken for the RESET pin. The RESET pin
  needs to have a 5-V input. In order to do this R40 must be installed
  to create a voltage divider network that will drop the voltage down to
  5 V


It is certain that the RESET should be controlled.

  

The R40 (greyed out in the image) should be sized so that, the RESET pin will see 5 V when the need is there to deassert. If there is no stable power supply available (to work with voltage divider, as @SpacemanScott mentioned, you can use a 5 V, zener diode with series resistor to limit the current, or other methods depending on the other modules you have in your schematics.
One thing is clear, not to use the same component generated 5V for reset line.