qcacmn: add API to get ast entry from peer ast list

We are adding AST entry to ast_table from
dp_rx_mcast_echo_check in STA mode as in STA mode
we will not get the peer map event.

Find AST entry from the peer ast list to get ast entry
added in host for that particular peer. As in QWRAP
mode there can exist multiple peers with same mac address
and corresponding AST entries will be added

Change-Id: Ia75f88c03c4d0eba0edbebf8e8f40d41396543d5
CRs-fixed: 2307540

dp/wifi3.0/dp_peer.h

@@ -119,6 +119,10 @@ struct dp_ast_entry *dp_peer_ast_hash_find_by_pdevid(struct dp_soc *soc,
 struct dp_ast_entry *dp_peer_ast_hash_find(struct dp_soc *soc,
 						uint8_t *ast_mac_addr);
 
+struct dp_ast_entry *dp_peer_ast_list_find(struct dp_soc *soc,
+					   struct dp_peer *peer,
+					   uint8_t *ast_mac_addr);
+
 uint8_t dp_peer_ast_get_pdev_id(struct dp_soc *soc,
 				struct dp_ast_entry *ast_entry);