ath9k: Cleanup function return types

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/mac.c b/drivers/net/wireless/ath/ath9k/mac.c
index 6f923e3..800bfab 100644
--- a/drivers/net/wireless/ath/ath9k/mac.c
+++ b/drivers/net/wireless/ath/ath9k/mac.c
@@ -40,20 +40,15 @@
 	return REG_READ(ah, AR_QTXDP(q));
 }
 
-bool ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
+void ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
 {
 	REG_WRITE(ah, AR_QTXDP(q), txdp);
-
-	return true;
 }
 
-bool ath9k_hw_txstart(struct ath_hw *ah, u32 q)
+void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
 {
 	DPRINTF(ah->ah_sc, ATH_DBG_QUEUE, "Enable TXE on queue: %u\n", q);
-
 	REG_WRITE(ah, AR_Q_TXE, 1 << q);
-
-	return true;
 }
 
 u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q)
@@ -178,7 +173,7 @@
 #undef ATH9K_TIME_QUANTUM
 }
 
-bool ath9k_hw_filltxdesc(struct ath_hw *ah, struct ath_desc *ds,
+void ath9k_hw_filltxdesc(struct ath_hw *ah, struct ath_desc *ds,
 			 u32 segLen, bool firstSeg,
 			 bool lastSeg, const struct ath_desc *ds0)
 {
@@ -202,8 +197,6 @@
 	ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
 	ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
 	ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
-
-	return true;
 }
 
 void ath9k_hw_cleartxdesc(struct ath_hw *ah, struct ath_desc *ds)
@@ -888,7 +881,7 @@
 	return 0;
 }
 
-bool ath9k_hw_setuprxdesc(struct ath_hw *ah, struct ath_desc *ds,
+void ath9k_hw_setuprxdesc(struct ath_hw *ah, struct ath_desc *ds,
 			  u32 size, u32 flags)
 {
 	struct ar5416_desc *ads = AR5416DESC(ds);
@@ -901,8 +894,6 @@
 	ads->ds_rxstatus8 &= ~AR_RxDone;
 	if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
 		memset(&(ads->u), 0, sizeof(ads->u));
-
-	return true;
 }
 
 bool ath9k_hw_setrxabort(struct ath_hw *ah, bool set)