ath9k: export methods related to ACK timeout estimation

Remove static keyword and export ath9k_hw_setslottime(),
ath9k_hw_set_ack_timeout() and ath9k_hw_set_cts_timeout() in hw.h.
These methods will be used in ACK timeout estimation algorithm (dynack)
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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

@@ -935,21 +935,21 @@ static void ath9k_hw_set_sifs_time(struct ath_hw *ah, u32 us)
 	REG_WRITE(ah, AR_D_GBL_IFS_SIFS, val);
 }
 
-static void ath9k_hw_setslottime(struct ath_hw *ah, u32 us)
+void ath9k_hw_setslottime(struct ath_hw *ah, u32 us)
 {
 	u32 val = ath9k_hw_mac_to_clks(ah, us);
 	val = min(val, (u32) 0xFFFF);
 	REG_WRITE(ah, AR_D_GBL_IFS_SLOT, val);
 }
 
-static void ath9k_hw_set_ack_timeout(struct ath_hw *ah, u32 us)
+void ath9k_hw_set_ack_timeout(struct ath_hw *ah, u32 us)
 {
 	u32 val = ath9k_hw_mac_to_clks(ah, us);
 	val = min(val, (u32) MS(0xFFFFFFFF, AR_TIME_OUT_ACK));
 	REG_RMW_FIELD(ah, AR_TIME_OUT, AR_TIME_OUT_ACK, val);
 }
 
-static void ath9k_hw_set_cts_timeout(struct ath_hw *ah, u32 us)
+void ath9k_hw_set_cts_timeout(struct ath_hw *ah, u32 us)
 {
 	u32 val = ath9k_hw_mac_to_clks(ah, us);
 	val = min(val, (u32) MS(0xFFFFFFFF, AR_TIME_OUT_CTS));

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

@@ -1080,6 +1080,10 @@ void ar9002_hw_load_ani_reg(struct ath_hw *ah, struct ath9k_channel *chan);
 void ath9k_ani_reset(struct ath_hw *ah, bool is_scanning);
 void ath9k_hw_ani_monitor(struct ath_hw *ah, struct ath9k_channel *chan);
 
+void ath9k_hw_set_ack_timeout(struct ath_hw *ah, u32 us);
+void ath9k_hw_set_cts_timeout(struct ath_hw *ah, u32 us);
+void ath9k_hw_setslottime(struct ath_hw *ah, u32 us);
+
 #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
 static inline bool ath9k_hw_btcoex_is_enabled(struct ath_hw *ah)
 {