qcacmn: Fix failing to get rx stats in MLO mode

In MLO mode, there are 2 link peers and 1 MLD peer. TX/RX stats
is kept in txrx_peer, which only exists in MLD peer. This change
aims at fixing HDD failing to get rx stats info when in MLO mode.

Change-Id: I046003018c72ca3c9129e3b9e5abca4a46a024ca
CRs-Fixed: 3298344

dp/wifi3.0/dp_main.c

@@ -9795,7 +9795,7 @@ void dp_get_peer_basic_stats(struct dp_peer *peer,
 {
 	struct dp_txrx_peer *txrx_peer;
 
-	txrx_peer = peer->txrx_peer;
+	txrx_peer = dp_get_txrx_peer(peer);
 	if (!txrx_peer)
 		return;
 
@@ -9837,7 +9837,7 @@ void dp_get_peer_per_pkt_stats(struct dp_peer *peer,
 	struct dp_txrx_peer *txrx_peer;
 	struct dp_peer_per_pkt_stats *per_pkt_stats;
 
-	txrx_peer = peer->txrx_peer;
+	txrx_peer = dp_get_txrx_peer(peer);
 	if (!txrx_peer)
 		return;