rsi: update some comments

These functions don't return -1 on failure.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_mac80211.c

@@ -754,7 +754,7 @@ static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
  * @vif: Pointer to the ieee80211_vif structure.
  * @key: Pointer to the ieee80211_key_conf structure.
  *
- * Return: status: 0 on success, -1 on failure.
+ * Return: status: 0 on success, negative error codes on failure.
  */
 static int rsi_hal_key_config(struct ieee80211_hw *hw,
 			      struct ieee80211_vif *vif,
@@ -1192,7 +1192,7 @@ static void rsi_set_min_rate(struct ieee80211_hw *hw,
  * @vif: Pointer to the ieee80211_vif structure.
  * @sta: Pointer to the ieee80211_sta structure.
  *
- * Return: 0 on success, -1 on failure.
+ * Return: 0 on success, negative error codes on failure.
  */
 static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
 				struct ieee80211_vif *vif,
@@ -1301,7 +1301,7 @@ static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
  * @vif: Pointer to the ieee80211_vif structure.
  * @sta: Pointer to the ieee80211_sta structure.
  *
- * Return: 0 on success, -1 on failure.
+ * Return: 0 on success, negative error codes on failure.
  */
 static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
 				   struct ieee80211_vif *vif,
@@ -1421,7 +1421,7 @@ static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
  * @tx_ant: Bitmap for tx antenna
  * @rx_ant: Bitmap for rx antenna
  * 
- * Return: 0 on success, -1 on failure.
+ * Return: 0 on success, negative error codes on failure.
  */
 static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
 				    u32 *tx_ant, u32 *rx_ant)
@@ -1528,7 +1528,7 @@ static const struct ieee80211_ops mac80211_ops = {
  * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
  * @common: Pointer to the driver private structure.
  *
- * Return: 0 on success, -1 on failure.
+ * Return: 0 on success, negative error codes on failure.
  */
 int rsi_mac80211_attach(struct rsi_common *common)
 {