iwlwifi: move tx response common handlers to iwlcore

This pach moves common tx response handlers to the header files
and iwl-tx.c.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index bad0e94..2652e37 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-commands.h
@@ -1365,6 +1365,15 @@
 	TX_ABORT_REQUIRED_MSK = 0x80000000,	/* bits 31:31 */
 };
 
+static inline int iwl_is_tx_success(u32 status)
+{
+	status &= TX_STATUS_MSK;
+	return (status == TX_STATUS_SUCCESS)
+	    || (status == TX_STATUS_DIRECT_DONE);
+}
+
+
+
 /* *******************************
  * TX aggregation status
  ******************************* */