btsdio: free sk_buff with kfree_skb

free sk_buff with kfree_skb, instead of kree
 
Signed-off-by: Sergio Luis <sergio@larces.uece.br>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/bluetooth/btsdio.c b/drivers/bluetooth/btsdio.c
index 58630cc..cda6c7c 100644
--- a/drivers/bluetooth/btsdio.c
+++ b/drivers/bluetooth/btsdio.c
@@ -152,7 +152,7 @@
 
 	err = sdio_readsb(data->func, skb->data, REG_RDAT, len - 4);
 	if (err < 0) {
-		kfree(skb);
+		kfree_skb(skb);
 		return err;
 	}