ath9k_hw: ar9002_hw_spectral_scan_config() can be static

Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ar9002_phy.c

@@ -555,7 +555,7 @@ static void ar9002_hw_antdiv_comb_conf_set(struct ath_hw *ah,
 	REG_WRITE(ah, AR_PHY_MULTICHAIN_GAIN_CTL, regval);
 }
 
-void ar9002_hw_spectral_scan_config(struct ath_hw *ah,
+static void ar9002_hw_spectral_scan_config(struct ath_hw *ah,
 				    struct ath_spec_scan *param)
 {
 	u8 count;