ethernet: Delete unnecessary checks before the macro call “dev_kfree_skb”

The dev_kfree_skb() function performs also input parameter validation.
Thus the test around the shown calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/amd/ni65.c

@@ -697,16 +697,14 @@ static void ni65_free_buffer(struct priv *p)
 	for(i=0;i<TMDNUM;i++) {
 		kfree(p->tmdbounce[i]);
 #ifdef XMT_VIA_SKB
-		if(p->tmd_skb[i])
-			dev_kfree_skb(p->tmd_skb[i]);
+		dev_kfree_skb(p->tmd_skb[i]);
 #endif
 	}
 
 	for(i=0;i<RMDNUM;i++)
 	{
 #ifdef RCV_VIA_SKB
-		if(p->recv_skb[i])
-			dev_kfree_skb(p->recv_skb[i]);
+		dev_kfree_skb(p->recv_skb[i]);
 #else
 		kfree(p->recvbounce[i]);
 #endif