wcn36xx: Add accessor macro HW_VALUE_PHY for PHY settings

Adds HW_VALUE_PHY(hw_value) an access macro that will be used to
extract a hardware specific PHY setting for a given channel.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200910150708.2179043-4-bryan.odonoghue@linaro.org

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

@@ -83,6 +83,8 @@ enum wcn36xx_ampdu_state {
 	WCN36XX_AMPDU_OPERATIONAL,
 };
 
+#define HW_VALUE_PHY_SHIFT 8
+#define HW_VALUE_PHY(hw_value) ((hw_value) >> HW_VALUE_PHY_SHIFT)
 #define HW_VALUE_CHANNEL(hw_value) ((hw_value) & 0xFF)
 #define WCN36XX_HW_CHANNEL(__wcn)\
 	HW_VALUE_CHANNEL(__wcn->hw->conf.chandef.chan->hw_value)