ctxlink/wifi_server: Fix variable names when debug is enabled.

[sidprice]

when the firmware has debug enabled some DEBUG_WARN messages in ctxLink had invalid/undefined names. These are fixed by this PR.

Your checklist for this pull request

• I've read the Code of Conduct
• I've read the guidelines for contributing to this repository
• It builds for hardware native (see Building the firmware)
• It builds as BMDA (see Building the BMDA)
• I've tested it to the best of my ability
• My commit messages provide a useful short description of what the commits do

Closing issues

None

[dragonmux]

LGTM, sorry these didn't get caught sooner - and thank you for the fix for this. Merging!