iwlagn: move iwl_free_pages to iwl-shared.h

This helper is used by the transport and the upper layer.
Kill __iwl_free_pages which was used in the transport only.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-sta.c b/drivers/net/wireless/iwlwifi/iwl-sta.c
index 1154e48..26b2bd4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-sta.c
+++ b/drivers/net/wireless/iwlwifi/iwl-sta.c
@@ -177,7 +177,7 @@
 		pkt = (struct iwl_rx_packet *)cmd.reply_page;
 		ret = iwl_process_add_sta_resp(priv, sta, pkt, true);
 	}
-	iwl_free_pages(priv, cmd.reply_page);
+	iwl_free_pages(priv->shrd, cmd.reply_page);
 
 	return ret;
 }
@@ -455,7 +455,7 @@
 			break;
 		}
 	}
-	iwl_free_pages(priv, cmd.reply_page);
+	iwl_free_pages(priv->shrd, cmd.reply_page);
 
 	return ret;
 }