wcn36xx: Add accessor macro HW_VALUE_CHANNEL for hardware channels

Adds HW_VALUE_CHANNEL(hw_value) an access macro that will be used to
extract the channel number from struct ieee80211_channel->hw_value in
preparation for also storing PHY settings for 802.11ac in the upper bits of
hw_value.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910150708.2179043-2-bryan.odonoghue@linaro.org

drivers/net/wireless/ath/wcn36xx/wcn36xx.h

@@ -83,7 +83,9 @@ enum wcn36xx_ampdu_state {
 	WCN36XX_AMPDU_OPERATIONAL,
 };
 
-#define WCN36XX_HW_CHANNEL(__wcn) (__wcn->hw->conf.chandef.chan->hw_value)
+#define HW_VALUE_CHANNEL(hw_value) ((hw_value) & 0xFF)
+#define WCN36XX_HW_CHANNEL(__wcn)\
+	HW_VALUE_CHANNEL(__wcn->hw->conf.chandef.chan->hw_value)
 #define WCN36XX_BAND(__wcn) (__wcn->hw->conf.chandef.chan->band)
 #define WCN36XX_CENTER_FREQ(__wcn) (__wcn->hw->conf.chandef.chan->center_freq)
 #define WCN36XX_LISTEN_INTERVAL(__wcn) (__wcn->hw->conf.listen_interval)