Hello,

this my attempt to split the driver into 3 patches, so that it can be
send via mailing lists:
- core support
- es581_4
- es58x_fd

For now I've removed the setting of dql.min_limit, that can be added
back in a later patch, once discussed with upstream netdev. While
working on the code, I've added some typo and kernel doc fixes.

I plan to squash the patches, I've kept them separate for better
illustration.

regards,
Marc