[rend-non-be][split-non-be] Resolve "Wrong indexing in ivas_masa_ext_rend_parambin_internal"

• Related issues: #1442
• Requested reviewers: @pajunen

Reason why this change is needed

• There is wrong and inconsistent indexing used

Description of the change

• Fix the indexing

Affected operating points

• Can be non-BE for IVAS_rend and split rendering when using IVAS_rend

Related to #1442