iwlwifi: dbg: use dump mask for tx command dumping length

Only add the size of the tx command to the dump file size if it is set
in the dump_mask.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

@@ -3165,8 +3165,10 @@ static struct iwl_trans_dump_data
 	len = sizeof(*dump_data);
 
 	/* host commands */
-	len += sizeof(*data) +
-		cmdq->n_window * (sizeof(*txcmd) + TFD_MAX_PAYLOAD_SIZE);
+	if (dump_mask & BIT(IWL_FW_ERROR_DUMP_TXCMD))
+		len += sizeof(*data) +
+			cmdq->n_window * (sizeof(*txcmd) +
+					  TFD_MAX_PAYLOAD_SIZE);
 
 	/* FW monitor */
 	if (dump_mask & BIT(IWL_FW_ERROR_DUMP_FW_MONITOR))