ath9k: fix spelling in ath9k_tx99_init()

It's spelled hardware, not harware.
Signed-off-by: Ammly Fredrick <ammlyf@gmail.com>
[kvalo@qca.qualcomm.com: improve commit log]
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath9k/tx99.c

@@ -153,7 +153,7 @@ static int ath9k_tx99_init(struct ath_softc *sc)
 		sc->tx99_power,
 		sc->tx99_power / 2);
 
-	/* We leave the harware awake as it will be chugging on */
+	/* We leave the hardware awake as it will be chugging on */
 
 	return 0;
 }