openMHA Atomic Referenced Subsystems

[fe-tdavis]

Several referenced models in the design are treated as atomic subsystems (e.g. FFT Synthesis, FFT Analysis) which prevents HDL from generating when more than one of those models appear in different subsystems. As a result, the left and right channels can't be synthesized to VHDL simultaneously. While simply disabling Treat as atomic unit allows normal subsystems to be considered non-atomic, disabling this option for referenced models requires more research.