This reverts commit e140516130. This assert triggers for AX and AXWii uCode games (including the Wii System Menu) for various addresses that seem to be 4-byte aligned. Worse still, if the DSP thread is in use (i.e. for DSP LLE recompiler, but not for DSP LLE interpreter), Dolphin completely hangs after the panic alert. Perhaps the data DMA has fewer restrictions compared to the instruction DMA?
The change to DSPTool (e391a28102) has not been reverted, as it still fixes broken behavior for DSPSpy at -O0 on real hardware.