In WBM error processing read peer_id from peer_meta_data
instead of sw_peer_id.
This changes is needed because we need to process Rx packet
on ML peer. But in MLO case sw_peer_id field contains
link_peer_id where as peer_meta_data has ml_peer_id.
Change-Id: I3f469adfdf7efa88cb081e94fa9fe0c54c1fb078