Fix: Missing Cortex-A/R memory IO diagnostics

[dragonmux]

Detailed description

This PR fixes/improves the diagnostics in the Cortex-A/R memory IO routines so we get comparable debugging information to the Cortex-M memory IO routines to aid with debugging target support.

This wound up being a problem we needed solved when writing the Renesas RZ/A1LU support which is an upcoming PR.

Your checklist for this pull request

• I've read the Code of Conduct
• I've read the guidelines for contributing to this repository
• It builds for hardware native (make PROBE_HOST=native)
• It builds as BMDA (make PROBE_HOST=hosted)
• I've tested it to the best of my ability
• My commit messages provide a useful short description of what the commits do

Closing issues

[esden]

LGTM