ath5k: add missing ieee80211_free_hw() on unload in AHB code

Signed-off-by: NPavel Roskin <proski@gnu.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/ahb.c

@@ -219,6 +219,7 @@ static int ath_ahb_remove(struct platform_device *pdev)
 
 	ath5k_deinit_softc(sc);
 	platform_set_drvdata(pdev, NULL);
+	ieee80211_free_hw(hw);
 
 	return 0;
 }