Harmonization of core-coder functions - Word16 vs Word32 inputs

In the table of Potential Duplicates, there are listed some functions that differ only by the *_ivas_fx appendix. In fact, these functions are different in terms of accepting different data-types (Word16 vs. Word32) of input buffers/parameters.

These functions are usually differentiated in the framework by the appendix *_fx() vs. *_fx_32(). This MR proposes to follow this logic for the functions listed at Potential Duplicates.