qcacld-3.0: Use skb_alloc instead of qdf_nbuf_alloc for control port

Whenever a eapol packet is received over the control port driver
allocated using the qdf_nbuf_alloc and passes it over to the
hard_start_xmit which again tries to add the skb to the qdf nbuf
tracking list these operations result in the false positive warning
message of double allocation from the nbuf debug framework.

So, use the skb_alloc api instead of qdf_nbuf_alloc, so the skb
can be tracked in the hard_start_xmit and  avoid the warning from
the debug framework

Change-Id: I7cdb54fa6ef49f313cfb5ff48221aaf742e18a1f
CRs-Fixed: 3079746

core/hdd/src/wlan_hdd_cfg80211.c

@@ -23288,10 +23288,13 @@ static int __wlan_hdd_cfg80211_tx_control_port(struct wiphy *wiphy,
 	struct ethhdr *ehdr;
 	struct hdd_adapter *adapter = WLAN_HDD_GET_PRIV_PTR(dev);
 
-	nbuf = qdf_nbuf_alloc(NULL, (len + sizeof(struct ethhdr)), 0, 4, false);
+	hdd_enter();
+
+	nbuf = dev_alloc_skb(len + sizeof(struct ethhdr));
 	if (!nbuf)
 		return -ENOMEM;
-	qdf_nbuf_reserve(nbuf, sizeof(struct ethhdr));
+
+	skb_reserve(nbuf, sizeof(struct ethhdr));
 	skb_put_data(nbuf, buf, len);
 	ehdr = skb_push(nbuf, sizeof(struct ethhdr));
 	qdf_mem_copy(ehdr->h_dest, dest, ETH_ALEN);
@@ -23307,12 +23310,13 @@ static int __wlan_hdd_cfg80211_tx_control_port(struct wiphy *wiphy,
 	nbuf->protocol = htons(ETH_P_PAE);
 	skb_reset_network_header(nbuf);
 	skb_reset_mac_header(nbuf);
-	wlan_hdd_select_queue(dev, nbuf);
 
 	netif_tx_lock(dev);
+	wlan_hdd_select_queue(dev, nbuf);
 	dev->netdev_ops->ndo_start_xmit(nbuf, dev);
 	netif_tx_unlock(dev);
 
+	hdd_exit();
 	return 0;
 }