Code cleanup: ivas_mc_param_enc_fx.c: Inconsistent naming of variables

Basic info

Within ivas_mc_param_enc_fx.c, the names of some variables is inconsistent.

• Float reference:
  • Encoder (float):
  • Decoder (float):
• Fixed point:
  • Encoder (fixed):
  • Decoder (fixed):

Bug description

Ways to reproduce

Box folder: ...\Box_EXTERNAL_IVAS_BASOP_VERIFICATION\issues\issue-xxxx