iwlagn: add rx_free to transport layer

The transport layer ness to release all rx ressources. This function is an API for it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 7d3e55d..04b19a4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1233,9 +1233,11 @@
  * struct iwl_trans_ops - transport specific operations
 
  * @rx_init: inits the rx memory, allocate it if needed
+ *@rx_free: frees the rx memory
  */
 struct iwl_trans_ops {
 	int (*rx_init)(struct iwl_priv *priv);
+	void (*rx_free)(struct iwl_priv *priv);
 };
 
 struct iwl_trans {