[non-BE] [split-non-BE] [allow-regression] Fix bug in calculating parcor coefficient in Calc_rc0_h()

• Related issues: #2462 (closed)
• Requested reviewers:

Reason why this change is needed

• Bug in calculating parcor coefficient in Calc_rc0_h().

Description of the change

• Fix scaling in calculating parcor coefficient in Calc_rc0_h().

Affected operating points

• Not-BE but BC.

Closes #2462 (closed)