separable conv fixes

[rkovachfuentes]

A# Description

minimal changes to allow QSeparableConv2D with hls4ml

Type of change

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Note: Please delete options that are not relevant.

• [x] Bug fix (non-breaking change that fixes an issue)
• [ ] Documentation update
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] A new research paper code implementation
• [ ] Other (Specify)

Tests

tried to compile a model with QSeparableConv2D layers - it did not work before, it works now

Test Configuration:

Checklist

• [x] I have read the guidelines for contributing.
• [x] I have commented my code, particularly in hard-to-understand areas.
• [x] I have made corresponding changes to the documentation.
• [x] My changes generate no new warnings.
• [x] I have installed and run pre-commit on the files I edited or added.
• [x] I have added tests that prove my fix is effective or that my feature works.

[vloncar]

Thanks for this. Can you add a unit test?

[jmitrevs]

@rkovachfuentes, in the test/pytest/test_qkeras.py file (or the test/pytest/test_seqconv2d.py file) it should be pretty easy to add a test for QSeparableConv2D--basically copy and slightly modify test_sepconv2d from test_sepconv2d.py.

[vloncar]

Continued in #861, closing.