It is not supported. There is the urtwn driver in OpenBSD. But AFAIK, no one works on porting of it. Currently i am trying to port the rsu driver from OpenBSD, but because of lack of time the porting progressing slowly. To be sure what driver needed for your device, can you show the output of usbconfig -d ugenX.Y dump_device_desc dump_all_config_desc
, where ugenX.Y is your wireless device.