Resolve "Harmonize tcx_res_Q_spec_fx() and tcx_res_Q_spec_ivas_fx()"

• Related issues: #2454 (closed)
• Requested reviewers: @gerstacker

Reason why this change is needed

• Harmonize the functions tcx_res_Q_spec_fx() and tcx_res_Q_spec_ivas_fx().

Description of the change

• Harmonize the functions tcx_res_Q_spec_fx() and tcx_res_Q_spec_ivas_fx().

Affected operating points

• All changes are BE.

Closes #2454 (closed)