staging: ks7010: Remove unnecessary null check

Remove the unnecessary socket buffer null check in hostif_data_request.
There is already an appropriate null check in the calling function:

(ks_wlan_net.c) ks_wlan_start_xmit
Signed-off-by: Aymen Qader <qader.aymen@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ks7010/ks_hostif.c

@@ -1023,8 +1023,8 @@ int hostif_data_request(struct ks_wlan_private *priv, struct sk_buff *skb)
 	    priv->wpa.mic_failure.stop) {
 		if (netif_queue_stopped(priv->net_dev))
 			netif_wake_queue(priv->net_dev);
-		if (skb)
-			dev_kfree_skb(skb);
+
+		dev_kfree_skb(skb);
 
 		return 0;
 	}