Fix broken compatibility with upstream TFLM

[PhilippvK]

This week the TFLM integration test broke due to upstream changes. (https://github.com/tum-ei-eda/muriscv-nn/actions/runs/4311825732)

TODO:

• [x] Fix ccompatibility
• [x] Instead of only running that CI job against the latest upstream codebase, I would propose to deploy a "matrix" of two runs:
  • Test vs. Upstream: If something breaks due to upstream changes.
  • Test vs. fixed commit chosen by us: This way we find out if something broke on our side.

The fixed commit should be (automatically) updated to the latest commit which is known to be compatible.

[PhilippvK]

Follow-Up:

Find a way to store the last working TFLM commit somewhere in the repo (either a branch, wiki page or artifact) and update it unless the upstream TFLM integration failed. This wait we should always known which upstream commit is responsible for a failing test and cann still see if something breaks on our side while fixing the compatibily with upstream TLFM.

[PhilippvK]

Documenting the TFLM commit would also resolve the issues raised here: #17

[PhilippvK]

Seems like integration with TFLM broke again due to upstream changes. See: https://github.com/tum-ei-eda/muriscv-nn/actions/runs/5560759619

[christian-herber-nxp]

Could you specify the commit that the patch can be applied against currently?

[PhilippvK]

We actually support the latest version of TFLM on one of our development branches: https://github.com/tum-ei-eda/muriscv-nn/tree/test-sync

If the test-sync branch does not work for you, please reach out to us again.

We are currently working on a way to sync upstream CMSIS-NN changes automatically and will try merge these changes to the master branch ASAP. Sorry for the inconvenience.

[christian-herber-nxp]

the branch works for me