ath9k_hw: clean up SREV version checks

There's no need to have separate callbacks for pre-AR9003 vs AR9003
SREV version checks, so just merge those into one function.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/hw.h

@@ -532,7 +532,6 @@ struct ath_hw_radar_conf {
  *
  * @init_mode_regs: Initializes mode registers
  * @init_mode_gain_regs: Initialize TX/RX gain registers
- * @macversion_supported: If this specific mac revision is supported
  *
  * @rf_set_freq: change frequency
  * @spur_mitigate_freq: spur mitigation
@@ -554,7 +553,6 @@ struct ath_hw_private_ops {
 
 	void (*init_mode_regs)(struct ath_hw *ah);
 	void (*init_mode_gain_regs)(struct ath_hw *ah);
-	bool (*macversion_supported)(u32 macversion);
 	void (*setup_calibration)(struct ath_hw *ah,
 				  struct ath9k_cal_list *currCal);