crypto: chtls - remove redundant null pointer check before kfree_skb

kfree_skb has taken the null pointer into account. hence it is safe
to remove the redundant null pointer check before kfree_skb.
Signed-off-by: Nzhong jiang <zhongjiang@huawei.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/chelsio/chtls/chtls_cm.c

@@ -234,7 +234,6 @@ static void chtls_send_reset(struct sock *sk, int mode, struct sk_buff *skb)
 
 	return;
 out:
-	if (skb)
 	kfree_skb(skb);
 }
 

drivers/crypto/chelsio/chtls/chtls_main.c

@@ -272,7 +272,6 @@ static void chtls_free_uld(struct chtls_dev *cdev)
 	for (i = 0; i < (1 << RSPQ_HASH_BITS); i++)
 		kfree_skb(cdev->rspq_skb_cache[i]);
 	kfree(cdev->lldi);
-	if (cdev->askb)
 	kfree_skb(cdev->askb);
 	kfree(cdev);
 }