wilc1000: free resource in wilc_wlan_txq_add_net_pkt() for failure path

Before returing from wilc_wlan_txq_add_net_pkt() invoke tx_complete_fn()
callback to free up allocated memory for failure cases.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20201125114059.10006-3-ajay.kathat@microchip.com

drivers/net/wireless/microchip/wilc1000/wlan.c

@@ -284,13 +284,17 @@ int wilc_wlan_txq_add_net_pkt(struct net_device *dev, void *priv, u8 *buffer,
 
 	wilc = vif->wilc;
 
-	if (wilc->quit)
+	if (wilc->quit) {
+		tx_complete_fn(priv, 0);
 		return 0;
+	}
 
 	tqe = kmalloc(sizeof(*tqe), GFP_ATOMIC);
 
-	if (!tqe)
+	if (!tqe) {
+		tx_complete_fn(priv, 0);
 		return 0;
+	}
 	tqe->type = WILC_NET_PKT;
 	tqe->buffer = buffer;
 	tqe->buffer_size = buffer_size;