Resolve "Harmonize apply_scale_ind(), apply_scale_ivas_fx()"

• Related issues: #2456 (closed)
• Requested reviewers: @kiene

Reason why this change is needed

• "Harmonize apply_scale_ind(), apply_scale_ivas_fx()", which are basically identical

Description of the change

• Harmonize apply_scale_ind(), apply_scale_ivas_fx()", which are basically identical

Affected operating points

• All operating points are BE.

Closes #2456 (closed)