Merge #58

58: Add detail to pmpcfgx.rs to return the individual pmp[x]cfg register … r=almindor a=dkhayes117

I wrote this about a dozen different ways.  Check it out and let me know what you think.  I didn't implement this for pmpcfg1 - pmpcfg3 as they will be identical setups as pmpcfg0 (well not quite identical).  Once I get pmpcfg0 satisfactory, I will add the rest to match.  Thanks,
Daniel


Co-authored-by: dkhayes117 <dkhayes117@yahoo.com>
Co-authored-by: dkhayes117 <59458913+dkhayes117@users.noreply.github.com>