wcn36xx: add missing 5GHz channels 136 and 144

The official feature-complete WCN3680B driver (known as prima, open source
but not upstream) supports channels 136 and 144.

However, these channels are missing in upstream. Add them here to get
closer to feature parity with prima.
Signed-off-by: Benjamin Li <benl@squareup.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211025175359.3591048-3-benl@squareup.com

drivers/net/wireless/ath/wcn36xx/main.c

@@ -85,7 +85,9 @@ static struct ieee80211_channel wcn_5ghz_channels[] = {
 	CHAN5G(5620, 124, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
 	CHAN5G(5640, 128, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
 	CHAN5G(5660, 132, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
+	CHAN5G(5680, 136, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
 	CHAN5G(5700, 140, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),
+	CHAN5G(5720, 144, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_HIGH),
 	CHAN5G(5745, 149, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_LOW),
 	CHAN5G(5765, 153, PHY_QUADRUPLE_CHANNEL_20MHZ_HIGH_40MHZ_LOW),
 	CHAN5G(5785, 157, PHY_QUADRUPLE_CHANNEL_20MHZ_LOW_40MHZ_HIGH),

drivers/net/wireless/ath/wcn36xx/smd.c

@@ -2478,6 +2478,7 @@ int wcn36xx_smd_feature_caps_exchange(struct wcn36xx *wcn)
 	set_feat_caps(msg_body.feat_caps, STA_POWERSAVE);
 	if (wcn->rf_id == RF_IRIS_WCN3680) {
 		set_feat_caps(msg_body.feat_caps, DOT11AC);
+		set_feat_caps(msg_body.feat_caps, WLAN_CH144);
 		set_feat_caps(msg_body.feat_caps, ANTENNA_DIVERSITY_SELECTION);
 	}