iwlwifi: fix typo in RX data tracing

The printk message should say RX, not TX.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/iwl-devtrace.h

@@ -306,7 +306,7 @@ TRACE_EVENT(iwlwifi_dev_rx_data,
 			memcpy(__get_dynamic_array(data),
 			       ((u8 *)rxbuf) + offs, len - offs);
 	),
-	TP_printk("[%s] TX frame data", __get_str(dev))
+	TP_printk("[%s] RX frame data", __get_str(dev))
 );
 
 #undef TRACE_SYSTEM