wil6210: fix memory leak in wil_find_tx_bcast_2

A successful call to wil_tx_ring takes skb reference so
it will only be freed in wil_tx_complete. Consume the skb
in wil_find_tx_bcast_2 to prevent memory leak.
Signed-off-by: Lior David <liord@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/wil6210/txrx.c

@@ -1395,6 +1395,8 @@ static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil,
 			wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i);
 			wil_set_da_for_vring(wil, skb2, i);
 			wil_tx_ring(wil, vif, v2, skb2);
+			/* successful call to wil_tx_ring takes skb2 ref */
+			dev_kfree_skb_any(skb2);
 		} else {
 			wil_err(wil, "skb_copy failed\n");
 		}