ath6kl: Don't advertise HT capability for incapable firmware

With firmwares which do not support rsn capability override
(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE) from host would
cause 4-way handshake failure when HT cap is advertised.
To fix this, do not advertise HT cap with cfg80211 for
those fw.

kvalo: fix a checkpatch warning
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath6kl/cfg80211.c

@@ -3496,7 +3496,14 @@ int ath6kl_cfg80211_init(struct ath6kl *ar)
 		return -EINVAL;
 	}
 
-	if (!ht) {
+	/*
+	 * Even if the fw has HT support, advertise HT cap only when
+	 * the firmware has support to override RSN capability, otherwise
+	 * 4-way handshake would fail.
+	 */
+	if (!(ht &&
+	      test_bit(ATH6KL_FW_CAPABILITY_RSN_CAP_OVERRIDE,
+		       ar->fw_capabilities))) {
 		ath6kl_band_2ghz.ht_cap.cap = 0;
 		ath6kl_band_2ghz.ht_cap.ht_supported = false;
 		ath6kl_band_5ghz.ht_cap.cap = 0;