recover ivas_dec_binaural_functions.c from bad state

ivas_dirac_dec_binaural_functions.c :
- added some more optimizations: FIX_1072_REPLACE_DIV_SQRT_BY_ISQRT and FIX1072_SPEEDUP_formulate2x2MixingMatrix_fx_reduceDivs
- moved some optimizations into another macro wrapping, added some move32 instrumentations
- added FIX1072_SPEEDUP_chol2x2_fx
- speedup formulate2x2MixingMatrix_fx
- added matrixMul_func1 and reduced mhz further
- no big testing, only output check of 1 bitstream

basop_utils.c:
- added macro BASOP_Util_Divide3232_Scale_cadence_REPLACEMENT speeds up decoder massively, no big changes at least in one tested bitstream

--- deactivate all optimizations for testing