hw: Add debug information to error messages

[colluca]

• Add misaligned address to the error message presented upon misaligned load/stores.
• Replace $display system function with $info, which already includes the timestamp as well as additional info, for misaligned load/stores and illegal instruction messages.

[colluca]

LGTM, alternatively you could also use $info or even $error instead of $display which prints the simulation time as well (with a bit more verbosity).

That's a good point, this would probably be best changed everywhere. I guess we can keep this open until I have some time to address this.