qcacld-3.0: Fix typo "avaiable"

Replace typo "avaiable" with correct spelling "available".

Change-Id: I6f62d402bf73a1b8c8b3abebdf14a6d9a02d96d2
CRs-Fixed: 2238297

core/hdd/src/wlan_hdd_tx_rx.c

@@ -991,7 +991,7 @@ static netdev_tx_t __hdd_hard_start_xmit(struct sk_buff *skb,
 		bool isDefaultAc = false;
 		/*
 		 * ADDTS request for this AC is sent, for now
-		 * send this packet through next avaiable lower
+		 * send this packet through next available lower
 		 * Access category until ADDTS negotiation completes.
 		 */
 		while (!likely