Simplify DMA interrupt handlers

[Dominaezzz]

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Submission Checklist 📝

• I have updated existing examples or added new ones (if applicable).
• I have used cargo xtask fmt-packages command to ensure that all changed code is formatted correctly.
• My changes were added to the CHANGELOG.md in the proper section.
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Pull Request Details 📖

Description

Less line of code, particularly on the PDMA side.
No changelog entry since this is internal refactor

Testing

It compiles

[MabezDev]

Thanks!

[bugadani]

Thanks