Integration of fixed point sub-functions 12

[x] SBA decoder functions updates.
[x] Conversion of ivas_td_binaural_renderer_sf.
[x] core_switching_post_dec_ivas_fx and waveform_adj2_fix integration and cleanup.
[x] Fixed Point impl. of ivas_limiter_open.
[x] ivas_ism_param_dec function fixed implementation.
[x] CLDFB handles cleanup.