The core code does not modify the 'struct snd_sof_dsp_ops' passed via pointer in various places, so this can be made pointer to const.

The structure itself is NOT always const - the initialization itself does have platform-specific changes, so what do we really gain from all this?

some commit messages say the code is "a bit safer", but I personally find the 'const' more confusing since the information that the structure can be modified during initialization is lost.