rt2x00: Remove reset_tsf()

Specifications indicate the TSF registers are read-only,
so there is no point in writing 0 to those registers.

As far as I know there isn't another way to reset the
TSF registers. So removing these callbacks will notify
mac80211 about the lack of support.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rt2x00/rt2400pci.c

@@ -1510,14 +1510,6 @@ static u64 rt2400pci_get_tsf(struct ieee80211_hw *hw)
 	return tsf;
 }
 
-static void rt2400pci_reset_tsf(struct ieee80211_hw *hw)
-{
-	struct rt2x00_dev *rt2x00dev = hw->priv;
-
-	rt2x00pci_register_write(rt2x00dev, CSR16, 0);
-	rt2x00pci_register_write(rt2x00dev, CSR17, 0);
-}
-
 static int rt2400pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
 				   struct ieee80211_tx_control *control)
 {
@@ -1586,7 +1578,6 @@ static const struct ieee80211_ops rt2400pci_mac80211_ops = {
 	.conf_tx		= rt2400pci_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt2400pci_get_tsf,
-	.reset_tsf		= rt2400pci_reset_tsf,
 	.beacon_update		= rt2400pci_beacon_update,
 	.tx_last_beacon		= rt2400pci_tx_last_beacon,
 };

drivers/net/wireless/rt2x00/rt2500pci.c

@@ -1821,14 +1821,6 @@ static u64 rt2500pci_get_tsf(struct ieee80211_hw *hw)
 	return tsf;
 }
 
-static void rt2500pci_reset_tsf(struct ieee80211_hw *hw)
-{
-	struct rt2x00_dev *rt2x00dev = hw->priv;
-
-	rt2x00pci_register_write(rt2x00dev, CSR16, 0);
-	rt2x00pci_register_write(rt2x00dev, CSR17, 0);
-}
-
 static int rt2500pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
 				   struct ieee80211_tx_control *control)
 {
@@ -1897,7 +1889,6 @@ static const struct ieee80211_ops rt2500pci_mac80211_ops = {
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt2500pci_get_tsf,
-	.reset_tsf		= rt2500pci_reset_tsf,
 	.beacon_update		= rt2500pci_beacon_update,
 	.tx_last_beacon		= rt2500pci_tx_last_beacon,
 };

drivers/net/wireless/rt2x00/rt61pci.c

@@ -2366,14 +2366,6 @@ static u64 rt61pci_get_tsf(struct ieee80211_hw *hw)
 	return tsf;
 }
 
-static void rt61pci_reset_tsf(struct ieee80211_hw *hw)
-{
-	struct rt2x00_dev *rt2x00dev = hw->priv;
-
-	rt2x00pci_register_write(rt2x00dev, TXRX_CSR12, 0);
-	rt2x00pci_register_write(rt2x00dev, TXRX_CSR13, 0);
-}
-
 static int rt61pci_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
 			  struct ieee80211_tx_control *control)
 {
@@ -2450,7 +2442,6 @@ static const struct ieee80211_ops rt61pci_mac80211_ops = {
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt61pci_get_tsf,
-	.reset_tsf		= rt61pci_reset_tsf,
 	.beacon_update		= rt61pci_beacon_update,
 };
 

drivers/net/wireless/rt2x00/rt73usb.c

@@ -1972,14 +1972,6 @@ static u64 rt73usb_get_tsf(struct ieee80211_hw *hw)
 #define rt73usb_get_tsf	NULL
 #endif
 
-static void rt73usb_reset_tsf(struct ieee80211_hw *hw)
-{
-	struct rt2x00_dev *rt2x00dev = hw->priv;
-
-	rt73usb_register_write(rt2x00dev, TXRX_CSR12, 0);
-	rt73usb_register_write(rt2x00dev, TXRX_CSR13, 0);
-}
-
 static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
 				 struct ieee80211_tx_control *control)
 {
@@ -2047,7 +2039,6 @@ static const struct ieee80211_ops rt73usb_mac80211_ops = {
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.get_tsf		= rt73usb_get_tsf,
-	.reset_tsf		= rt73usb_reset_tsf,
 	.beacon_update		= rt73usb_beacon_update,
 };