qcacld-3.0: Copy peer mac address when register new NDP peer
Since peer mac instead of sta_id used to find pointer to peer in
dp_register_peer, so copy and pass peer mac address when register new
ndp peer.
Change-Id: I47ab345fff83d9c03208c5c1457db0fb7f6ed9c0
CRs-Fixed: 2546705