Debug exception
Created by: silabs-PaulZ
Fixes issue #185 (closed)
Handle exceptions during Debug Mode. CSR and status will not be updated during exceptions. This pull request will also add dm_exception_addr_i port to top-level, which provides the address to jump to when an exception occurs during Debug Mode.
This PR should be done after PR #339
Related to documentation pull request: https://github.com/openhwgroup/core-v-docs/pull/63
A verification pull request will be needed to fix the top-level connection.