dm: Decouple abstract register width from bus width - #191
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Allow integrations to configure the maximum Access Register command width independently from the debug module bus width. Preserve the existing behavior by defaulting the new parameter to BusWidth. Co-authored-by: jcoulon <jcoulon@gemalto.com>
Add a direct dm_mem regression for 32-bit and 64-bit buses, configurable abstract register widths, and two selected harts sharing a 32-bit bus. Check command acceptance and the generated load/store width without modeling a processor core.
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Takes #83, cleans it up and adds tests to cover the different cases where the widths do not match.