ath9k_hw: make ath9k_hw_gettsf32 static

It is now only used in hw.c
Signed-off-by: NFelix Fietkau <nbd@openwrt.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

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

@@ -2312,11 +2312,10 @@ static u32 rightmost_index(struct ath_gen_timer_table *timer_table, u32 *mask)
 	return timer_table->gen_timer_index[b];
 }
 
-u32 ath9k_hw_gettsf32(struct ath_hw *ah)
+static u32 ath9k_hw_gettsf32(struct ath_hw *ah)
 {
 	return REG_READ(ah, AR_TSF_L32);
 }
-EXPORT_SYMBOL(ath9k_hw_gettsf32);
 
 struct ath_gen_timer *ath_gen_timer_alloc(struct ath_hw *ah,
 					  void (*trigger)(void *),

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

@@ -892,7 +892,6 @@ void ath9k_hw_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer);
 
 void ath_gen_timer_free(struct ath_hw *ah, struct ath_gen_timer *timer);
 void ath_gen_timer_isr(struct ath_hw *hw);
-u32 ath9k_hw_gettsf32(struct ath_hw *ah);
 
 void ath9k_hw_name(struct ath_hw *ah, char *hw_name, size_t len);