[nrf fromlist] Bluetooth: Host: L2CAP: Fix seg_recv call on SDU overflow

This fix calling seg_recv() callback being called even though channel
is being disconnected due to SDU overflow.

Upstream PR #: 80911

Signed-off-by: Lang Xie <lang.xie@nordicsemi.no>

subsys/bluetooth/host/l2cap.c

@@ -2557,6 +2557,7 @@ static void l2cap_chan_le_recv_seg_direct(struct bt_l2cap_le_chan *chan, struct
 	if (seg->len > sdu_remaining) {
 		LOG_WRN("L2CAP RX PDU total exceeds SDU");
 		bt_l2cap_chan_disconnect(&chan->chan);
+		return;
 	}
 
 	/* Commit receive. */