Resolve "Assert in StereoDmxEVS complexity job in EVS decoder"

• Related issues: #2245 (closed)
• Requested reviewers:

Reason why this change is needed

Fix assert in StereoDmxEVS complexity job in EVS decoder.

Description of the change

Initialize FD CNG structure with EVS-type of init function in case of StereoDmxEVS mode.

Affected operating points

None, BE modification

Closes #2245 (closed)