Bluetooth: btmrvl: remove pointless conditional before kfree_skb()

Remove pointless conditional before kfree_skb().
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

drivers/bluetooth/btmrvl_sdio.c

@@ -600,8 +600,7 @@ static int btmrvl_sdio_card_to_host(struct btmrvl_private *priv)
 exit:
 	if (ret) {
 		hdev->stat.err_rx++;
-		if (skb)
-			kfree_skb(skb);
+		kfree_skb(skb);
 	}
 
 	return ret;