Improve wiffi config flow handling

[mampfes]

Proposed change

Don't use async_set_unique_id and _abort_if_unique_id_configured
because TCP port number is not a unique id.

Use _async_abort_entries_match instead.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: Add unique id check in wiffi config flow #60388
• Link to documentation pull request:

Checklist

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[MartinHjelmare]

Thanks!

[frenck]

Thanks for the quick turnaround @mampfes 👍

Happy New Year 🍾