Fixed Issue 2551: "Harmonize function pair tcx_scalar_quantization_fx()"

Arash Azizirequested to merge
ivas_basop_issue_2551 into main

Reason why this change is needed

  • function tcx_quantization_scalar_fx() and tcx_quantization_ivas_fx() are likely similar and can be harmonized.

Description of the change

  • Changes in function definition declaration and instances.

Affected operating points

  • It should be bit exact.

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