Fix detection of QMC5883L

[haslinghuis]

Fixes: #12232

Retries 5 times and increased delay with 50%.

After testing it still didn't work. Interesting we found out we just need to lower I2C clockspeed to 400Hz.

[github-actions]

Do you want to test this code? Here you have an automated build:
Assets
WARNING: It may be unstable. Use only for testing! See: https://www.youtube.com/watch?v=I1uN9CN30gw for instructions for unified targets!

[blckmn]

AUTOMERGE: (FAIL)

• github identifies PR as mergeable -> FAIL
• assigned to a milestone -> PASS
• cooling off period lapsed -> FAIL
• commit count less or equal to three -> PASS
• Don't merge label NOT found -> PASS
• at least one RN: label found -> PASS
• Tested label found -> FAIL
• assigned to an approver -> PASS
• approver count at least three -> FAIL

[McGiverGim]

You have a complete thread with this problem: #4531
It only happens to some qmc, others work.

[haslinghuis]

Closing now as I stumbled upon that issue after I did the PR 🙂