qcacld-3.0: change peer search to mac address based in monitor mode
Commit 9e02e1e104e8 ("qcacmn: Cleanup dp_register_peer [PEER_ID_PHASE1]")
of qca-wifi-host-cmn changes peer search from peer id based to mac address
based, this change makes corresponding fix for monitor mode, otherwise it
will fail to get wlan interface up, since can't find peer.
Change-Id: Ife031b9e9b856850e08ef8c195e1a99c6dee80c5