Streams: Don't spam console when queue gets full

When interrupting a script which processes a data stream the console gets spammed with messages like

[      412649] bhi160: queue full for 2
[      412720] bhi160: queue full for 2
[      412795] bhi160: queue full for 2

That makes manual interaction with the card10 on the console difficult until the menu button is pressed, disabling the stream.