iwlwifi: move iwl_set_rxon_ht to iwl-agn-rxon.c

Moving this as part of iwl-core.c cleanup.

Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
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 90b1f3a..d7b1bd8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.h
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.h
@@ -127,6 +127,7 @@
 			     u32 changes);
 void iwlagn_config_ht40(struct ieee80211_conf *conf,
 			struct iwl_rxon_context *ctx);
+void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_config *ht_conf);
 
 /* uCode */
 int iwl_send_bt_env(struct iwl_priv *priv, u8 action, u8 type);