err_o of uDMA I2CM block not connected to anything

Placeholder Mike Thompson
2025-12-10T14:30:23Z

This issue was discovered during the effort to update the User Manual by `@cst-jayesht.` See [this discussion](https://gitlab.eclipse.org/openhw-group/backup-20260329/core-v-mcu/-/merge_requests/350#discussion_r2400337146) in pull-request #350:

> the err_o signal is left unconnected internally, so its behavior is undefined.

The purpose of this Issue is to flag that state of affairs and possibly update it in a future release of this project.