nfc: nxp-nci: Fix potential memory leak in nxp_nci_send()

nxp_nci_send() won't free the skb when it failed for the check before
write(). As the result, the skb will memleak. Free the skb when the
check failed.

Fixes: dece458 ("NFC: nxp-nci: Add support for NXP NCI chips")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Suggested-by: Pavel Machek <pavel@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/nfc/nxp-nci/core.c

@@ -73,11 +73,15 @@ static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
 	struct nxp_nci_info *info = nci_get_drvdata(ndev);
 	int r;
 
-	if (!info->phy_ops->write)
+	if (!info->phy_ops->write) {
+		kfree_skb(skb);
 		return -EOPNOTSUPP;
+	}
 
-	if (info->mode != NXP_NCI_MODE_NCI)
+	if (info->mode != NXP_NCI_MODE_NCI) {
+		kfree_skb(skb);
 		return -EINVAL;
+	}
 
 	r = info->phy_ops->write(info->phy_id, skb);
 	if (r < 0) {