iwlagn: add dumpit support for testmode trace function

For testmode trace function, huge amout of data need to pass to userspace.
Use the build-in nl80211 dumpt it function

Require nl80211 testmode dumpit support patch.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.h b/drivers/net/wireless/iwlwifi/iwl-agn.h
index d171684..d074e6c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.h
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.h
@@ -343,6 +343,9 @@
 /* svtool */
 #ifdef CONFIG_IWLWIFI_DEVICE_SVTOOL
 extern int iwl_testmode_cmd(struct ieee80211_hw *hw, void *data, int len);
+extern int iwl_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
+			     struct netlink_callback *cb,
+			     void *data, int len);
 extern void iwl_testmode_init(struct iwl_priv *priv);
 extern void iwl_testmode_cleanup(struct iwl_priv *priv);
 #else
@@ -352,6 +355,13 @@
 	return -ENOSYS;
 }
 static inline
+int iwl_testmode_dump(struct ieee80211_hw *hw, struct sk_buff *skb,
+		      struct netlink_callback *cb,
+		      void *data, int len)
+{
+	return -ENOSYS;
+}
+static inline
 void iwl_testmode_init(struct iwl_priv *priv)
 {
 }