Fix Bug causing Dynamic Idle to fail if RPM filtering is turned off

[ctzsnooze]

This is a Bug Fix for an issue where Dynamic Idle went to maximum Idle boost, when activated, if RPM Filtering was switched off, even though DShot Telemetry was enabled.

Many thanks to Eddie Trejo for finding the bug and reporting it!

I think the bug originated here in PR #11765, where the initialisation of the various RPM Filter init values exited before calculating the erpmToHz value. erpmToHz is required to calculate and return minMotorFrequencyHz to Dynamic Idle via getMinMotorFrequency.

This PR just moves the calculation erpmToHz up, in rpmFilterInit, so that it is calculated before the return when RPM Filtering is not enabled.

This appears to solve the bug.

[github-actions]

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

[blckmn]

We should probably also put this to the 4.4-maintenance branch

[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
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• at least one RN: label found -> PASS
• Tested label found -> FAIL
• assigned to an approver -> PASS
• approver count at least three -> FAIL

[klutvott123]

I'm thinking the processing of rpm data should probably be done elsewhere since it's used not only by the rpm filters. We have had issues like this before, and I'm sure we'll have them again, but for now I think this is good as a bugfix 🙂

[KarateBrot]

I'm thinking the processing of rpm data should probably be done elsewhere since it's used not only by the rpm filters. We have had issues like this before, and I'm sure we'll have them again, but for now I think this is good as a bugfix 🙂

That's on my TODO list for 4.5 👍