Discover TTM module in initramfs using dracut or mkinitcpio, not just initramfs-tools

[Fjalar]

The current version does not work for my system (CachyOS, arch-based) because it never tries to use mkinicpio for searching the initramfs image. This patch makes the tool work for me, and should also enable systems with dracut. I don't have a system with dracut, so if someone else could test that it would be appreciated.

[codecov]

Codecov Report

❌ Patch coverage is 44.73684% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.95%. Comparing base (a282daa) to head (03a3130).

Files with missing lines	Patch %	Lines
src/amd_debug/ttm.py	44.73%	17 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #57      +/-   ##
==========================================
- Coverage   89.97%   89.95%   -0.03%     
==========================================
  Files          36       36              
  Lines        8979     8987       +8     
  Branches      793      797       +4     
==========================================
+ Hits         8079     8084       +5     
  Misses        700      700              
- Partials      200      203       +3     

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