Details:
- Eliminated the IR loop in ref_var2m functions.
- Handled the rectangular and triangular portions of C matrix
separately.
- Added a condition to check and eliminate zero regions inside IC loop.
- modified kc selection logic to choose optimal KC in SUP
- Updated thresholds to choose between SUP and native.
Change-Id: I21908eaa6bc3a8f37bdea29f7bfca7e6fcfee724