Integrated low level IP Port driver from DLS

Integrated the low level asyn IP Port driver from the Diamond Light
Source so that StreamDevices can use it as well.

src/turboPmacController.cpp

@@ -267,9 +267,8 @@ asynStatus turboPmacController::writeRead(int axisNo, const char *command,
             checkMaxSubsequentTimeouts(timeoutCounter, axis);
             timeoutCounter += 1;
 
-            status = pasynOctetSyncIO->write(ipPortUser_, fullCommand,
-                                             fullComandLength, comTimeout_,
-                                             &nbytesOut);
+            status = pasynOctetSyncIO->write(
+                ipPortUser_, command, commandLength, comTimeout_, &nbytesOut);
             if (status != asynTimeout) {
                 asynPrint(this->pasynUserSelf, ASYN_TRACE_ERROR,
                           "Controller \"%s\", axis %d  => %s, line "