iwlwifi: move iwl_free_skb and mark it static

iwl_free_skb is used only in iwl-agn.c, move
it there and mark it static.
Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -2208,6 +2208,15 @@ void iwlagn_lift_passive_no_rx(struct iwl_priv *priv)
 	priv->passive_no_rx = false;
 }
 
+static void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
+{
+	struct ieee80211_tx_info *info;
+
+	info = IEEE80211_SKB_CB(skb);
+	kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
+	dev_kfree_skb_any(skb);
+}
+
 const struct iwl_op_mode_ops iwl_dvm_ops = {
 	.start = iwl_op_mode_dvm_start,
 	.stop = iwl_op_mode_dvm_stop,

drivers/net/wireless/iwlwifi/iwl-agn.h

@@ -97,7 +97,6 @@ static inline void iwl_set_calib_hdr(struct iwl_calib_hdr *hdr, u8 cmd)
 void iwl_down(struct iwl_priv *priv);
 void iwl_cancel_deferred_work(struct iwl_priv *priv);
 void iwlagn_prepare_restart(struct iwl_priv *priv);
-void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb);
 int __must_check iwl_rx_dispatch(struct iwl_op_mode *op_mode,
 				 struct iwl_rx_cmd_buffer *rxb,
 				 struct iwl_device_cmd *cmd);

drivers/net/wireless/iwlwifi/iwl-core.c

@@ -794,12 +794,3 @@ void iwl_set_hw_rfkill_state(struct iwl_op_mode *op_mode, bool state)
 
 	wiphy_rfkill_set_hw_state(priv->hw->wiphy, state);
 }
-
-void iwl_free_skb(struct iwl_op_mode *op_mode, struct sk_buff *skb)
-{
-	struct ieee80211_tx_info *info;
-
-	info = IEEE80211_SKB_CB(skb);
-	kmem_cache_free(iwl_tx_cmd_pool, (info->driver_data[1]));
-	dev_kfree_skb_any(skb);
-}